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Finding the Fourth Proportional to 520,442.70, 780,664.05 and 402,344.70

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Solution

The fourth proportional to 520,442.70, 780,664.05 and 402,344.70 is: 603,517.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,442.70 : 780,664.05 = 402,344.70 : x
  2. Step 2: Convert to fraction form
    520,442.70/780,664.05 = 402,344.70/x
  3. Step 3: Cross multiply
    520,442.70x = 780,664.05 × 402,344.70
  4. Step 4: Simplify right side
    520,442.70x = 314,096,042,998.04
  5. Step 5: Solve for x
    x = 314,096,042,998.04/520,442.70
  6. Step 6: Final answer
    x = 603,517.05

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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.