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Finding the Fourth Proportional to 485,672.78, 728,351.52 and 161,373.78

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Solution

The fourth proportional to 485,672.78, 728,351.52 and 161,373.78 is: 242,008.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,672.78 : 728,351.52 = 161,373.78 : x
  2. Step 2: Convert to fraction form
    485,672.78/728,351.52 = 161,373.78/x
  3. Step 3: Cross multiply
    485,672.78x = 728,351.52 × 161,373.78
  4. Step 4: Simplify right side
    485,672.78x = 117,536,837,144.28
  5. Step 5: Solve for x
    x = 117,536,837,144.28/485,672.78
  6. Step 6: Final answer
    x = 242,008.29

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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.