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Finding the Fourth Proportional to 521,165.80, 781,748.70 and 355,277.80

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Solution

The fourth proportional to 521,165.80, 781,748.70 and 355,277.80 is: 532,916.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,165.80 : 781,748.70 = 355,277.80 : x
  2. Step 2: Convert to fraction form
    521,165.80/781,748.70 = 355,277.80/x
  3. Step 3: Cross multiply
    521,165.80x = 781,748.70 × 355,277.80
  4. Step 4: Simplify right side
    521,165.80x = 277,737,958,288.86
  5. Step 5: Solve for x
    x = 277,737,958,288.86/521,165.80
  6. Step 6: Final answer
    x = 532,916.70

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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.