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Finding the Fourth Proportional to 520,758.87, 781,132.64 and 395,170.40

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Solution

The fourth proportional to 520,758.87, 781,132.64 and 395,170.40 is: 592,751.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,758.87 : 781,132.64 = 395,170.40 : x
  2. Step 2: Convert to fraction form
    520,758.87/781,132.64 = 395,170.40/x
  3. Step 3: Cross multiply
    520,758.87x = 781,132.64 × 395,170.40
  4. Step 4: Simplify right side
    520,758.87x = 308,680,491,920.34
  5. Step 5: Solve for x
    x = 308,680,491,920.34/520,758.87
  6. Step 6: Final answer
    x = 592,751.29

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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.