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Finding the Fourth Proportional to 485,345.80, 727,889.10 and 148,385.80

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Solution

The fourth proportional to 485,345.80, 727,889.10 and 148,385.80 is: 222,539.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,345.80 : 727,889.10 = 148,385.80 : x
  2. Step 2: Convert to fraction form
    485,345.80/727,889.10 = 148,385.80/x
  3. Step 3: Cross multiply
    485,345.80x = 727,889.10 × 148,385.80
  4. Step 4: Simplify right side
    485,345.80x = 108,008,406,414.78
  5. Step 5: Solve for x
    x = 108,008,406,414.78/485,345.80
  6. Step 6: Final answer
    x = 222,539.08

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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.