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Finding the Fourth Proportional to 538,520.90, 807,781.35 and 159,455.30

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Solution

The fourth proportional to 538,520.90, 807,781.35 and 159,455.30 is: 239,182.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,520.90 : 807,781.35 = 159,455.30 : x
  2. Step 2: Convert to fraction form
    538,520.90/807,781.35 = 159,455.30/x
  3. Step 3: Cross multiply
    538,520.90x = 807,781.35 × 159,455.30
  4. Step 4: Simplify right side
    538,520.90x = 128,805,017,498.66
  5. Step 5: Solve for x
    x = 128,805,017,498.66/538,520.90
  6. Step 6: Final answer
    x = 239,182.95

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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.