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Finding the Fourth Proportional to 1,208,736,939.80, 1,813,105,409.70 and 945,709,074.20

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Solution

The fourth proportional to 1,208,736,939.80, 1,813,105,409.70 and 945,709,074.20 is: 1,418,563,611.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,736,939.80 : 1,813,105,409.70 = 945,709,074.20 : x
  2. Step 2: Convert to fraction form
    1,208,736,939.80/1,813,105,409.70 = 945,709,074.20/x
  3. Step 3: Cross multiply
    1,208,736,939.80x = 1,813,105,409.70 × 945,709,074.20
  4. Step 4: Simplify right side
    1,208,736,939.80x = 1,714,670,238,434,398,720
  5. Step 5: Solve for x
    x = 1,714,670,238,434,398,720/1,208,736,939.80
  6. Step 6: Final answer
    x = 1,418,563,611.30

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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.