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Finding the Fourth Proportional to 520,838.80, 781,252.56 and 395,250.56

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Solution

The fourth proportional to 520,838.80, 781,252.56 and 395,250.56 is: 592,871.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,838.80 : 781,252.56 = 395,250.56 : x
  2. Step 2: Convert to fraction form
    520,838.80/781,252.56 = 395,250.56/x
  3. Step 3: Cross multiply
    520,838.80x = 781,252.56 × 395,250.56
  4. Step 4: Simplify right side
    520,838.80x = 308,790,511,841.43
  5. Step 5: Solve for x
    x = 308,790,511,841.43/520,838.80
  6. Step 6: Final answer
    x = 592,871.56

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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.