Home / 521,126.90-781,690.35-311,002.10

Finding the Fourth Proportional to 521,126.90, 781,690.35 and 311,002.10

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Solution

The fourth proportional to 521,126.90, 781,690.35 and 311,002.10 is: 466,503.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,126.90 : 781,690.35 = 311,002.10 : x
  2. Step 2: Convert to fraction form
    521,126.90/781,690.35 = 311,002.10/x
  3. Step 3: Cross multiply
    521,126.90x = 781,690.35 × 311,002.10
  4. Step 4: Simplify right side
    521,126.90x = 243,107,340,399.74
  5. Step 5: Solve for x
    x = 243,107,340,399.74/521,126.90
  6. Step 6: Final answer
    x = 466,503.15

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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.