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Finding the Fourth Proportional to 485,487.64, 728,462.58 and 219,329.56

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Solution

The fourth proportional to 485,487.64, 728,462.58 and 219,329.56 is: 329,098.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,487.64 : 728,462.58 = 219,329.56 : x
  2. Step 2: Convert to fraction form
    485,487.64/728,462.58 = 219,329.56/x
  3. Step 3: Cross multiply
    485,487.64x = 728,462.58 × 219,329.56
  4. Step 4: Simplify right side
    485,487.64x = 159,773,377,147.87
  5. Step 5: Solve for x
    x = 159,773,377,147.87/485,487.64
  6. Step 6: Final answer
    x = 329,098.75

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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.