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Finding the Fourth Proportional to 485,761.77, 728,691.21 and 148,798.53

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Solution

The fourth proportional to 485,761.77, 728,691.21 and 148,798.53 is: 223,212.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,761.77 : 728,691.21 = 148,798.53 : x
  2. Step 2: Convert to fraction form
    485,761.77/728,691.21 = 148,798.53/x
  3. Step 3: Cross multiply
    485,761.77x = 728,691.21 × 148,798.53
  4. Step 4: Simplify right side
    485,761.77x = 108,428,180,871.92
  5. Step 5: Solve for x
    x = 108,428,180,871.92/485,761.77
  6. Step 6: Final answer
    x = 223,212.67

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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.