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Finding the Fourth Proportional to 521,125.40, 781,947.30 and 205,592.60

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Solution

The fourth proportional to 521,125.40, 781,947.30 and 205,592.60 is: 308,491.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,125.40 : 781,947.30 = 205,592.60 : x
  2. Step 2: Convert to fraction form
    521,125.40/781,947.30 = 205,592.60/x
  3. Step 3: Cross multiply
    521,125.40x = 781,947.30 × 205,592.60
  4. Step 4: Simplify right side
    521,125.40x = 160,762,578,469.98
  5. Step 5: Solve for x
    x = 160,762,578,469.98/521,125.40
  6. Step 6: Final answer
    x = 308,491.16

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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.