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Finding the Fourth Proportional to 485,791.53, 728,709.18 and 148,807.62

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Solution

The fourth proportional to 485,791.53, 728,709.18 and 148,807.62 is: 223,218.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,791.53 : 728,709.18 = 148,807.62 : x
  2. Step 2: Convert to fraction form
    485,791.53/728,709.18 = 148,807.62/x
  3. Step 3: Cross multiply
    485,791.53x = 728,709.18 × 148,807.62
  4. Step 4: Simplify right side
    485,791.53x = 108,437,478,747.95
  5. Step 5: Solve for x
    x = 108,437,478,747.95/485,791.53
  6. Step 6: Final answer
    x = 223,218.13

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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.