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Finding the Fourth Proportional to 521,779.80, 781,503.30 and 510,115.80

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Solution

The fourth proportional to 521,779.80, 781,503.30 and 510,115.80 is: 764,033.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,779.80 : 781,503.30 = 510,115.80 : x
  2. Step 2: Convert to fraction form
    521,779.80/781,503.30 = 510,115.80/x
  3. Step 3: Cross multiply
    521,779.80x = 781,503.30 × 510,115.80
  4. Step 4: Simplify right side
    521,779.80x = 398,657,181,082.14
  5. Step 5: Solve for x
    x = 398,657,181,082.14/521,779.80
  6. Step 6: Final answer
    x = 764,033.37

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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.