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Finding the Fourth Proportional to 520,752.80, 781,123.55 and 395,164.32

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Solution

The fourth proportional to 520,752.80, 781,123.55 and 395,164.32 is: 592,742.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,752.80 : 781,123.55 = 395,164.32 : x
  2. Step 2: Convert to fraction form
    520,752.80/781,123.55 = 395,164.32/x
  3. Step 3: Cross multiply
    520,752.80x = 781,123.55 × 395,164.32
  4. Step 4: Simplify right side
    520,752.80x = 308,672,156,471.74
  5. Step 5: Solve for x
    x = 308,672,156,471.74/520,752.80
  6. Step 6: Final answer
    x = 592,742.19

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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.