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Finding the Fourth Proportional to 485,761.63, 728,691.03 and 148,798.39

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Solution

The fourth proportional to 485,761.63, 728,691.03 and 148,798.39 is: 223,212.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,761.63 : 728,691.03 = 148,798.39 : x
  2. Step 2: Convert to fraction form
    485,761.63/728,691.03 = 148,798.39/x
  3. Step 3: Cross multiply
    485,761.63x = 728,691.03 × 148,798.39
  4. Step 4: Simplify right side
    485,761.63x = 108,428,052,071.44
  5. Step 5: Solve for x
    x = 108,428,052,071.44/485,761.63
  6. Step 6: Final answer
    x = 223,212.47

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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.