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Finding the Fourth Proportional to 1,208,791,640.80, 1,813,187,461.20 and 945,763,775.20

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Solution

The fourth proportional to 1,208,791,640.80, 1,813,187,461.20 and 945,763,775.20 is: 1,418,645,662.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,791,640.80 : 1,813,187,461.20 = 945,763,775.20 : x
  2. Step 2: Convert to fraction form
    1,208,791,640.80/1,813,187,461.20 = 945,763,775.20/x
  3. Step 3: Cross multiply
    1,208,791,640.80x = 1,813,187,461.20 × 945,763,775.20
  4. Step 4: Simplify right side
    1,208,791,640.80x = 1,714,847,018,449,815,552
  5. Step 5: Solve for x
    x = 1,714,847,018,449,815,552/1,208,791,640.80
  6. Step 6: Final answer
    x = 1,418,645,662.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.