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Finding the Fourth Proportional to 605,210.80, 907,816.20 and 402,257.20

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Solution

The fourth proportional to 605,210.80, 907,816.20 and 402,257.20 is: 603,385.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,210.80 : 907,816.20 = 402,257.20 : x
  2. Step 2: Convert to fraction form
    605,210.80/907,816.20 = 402,257.20/x
  3. Step 3: Cross multiply
    605,210.80x = 907,816.20 × 402,257.20
  4. Step 4: Simplify right side
    605,210.80x = 365,175,602,726.64
  5. Step 5: Solve for x
    x = 365,175,602,726.64/605,210.80
  6. Step 6: Final answer
    x = 603,385.80

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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.