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Finding the Fourth Proportional to 521,709.56, 781,545.25 and 359,574.59

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Solution

The fourth proportional to 521,709.56, 781,545.25 and 359,574.59 is: 538,659.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,709.56 : 781,545.25 = 359,574.59 : x
  2. Step 2: Convert to fraction form
    521,709.56/781,545.25 = 359,574.59/x
  3. Step 3: Cross multiply
    521,709.56x = 781,545.25 × 359,574.59
  4. Step 4: Simplify right side
    521,709.56x = 281,023,807,129.60
  5. Step 5: Solve for x
    x = 281,023,807,129.60/521,709.56
  6. Step 6: Final answer
    x = 538,659.50

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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.