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Finding the Fourth Proportional to 485,391.60, 728,415.45 and 169,851.24

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Solution

The fourth proportional to 485,391.60, 728,415.45 and 169,851.24 is: 254,891.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,391.60 : 728,415.45 = 169,851.24 : x
  2. Step 2: Convert to fraction form
    485,391.60/728,415.45 = 169,851.24/x
  3. Step 3: Cross multiply
    485,391.60x = 728,415.45 × 169,851.24
  4. Step 4: Simplify right side
    485,391.60x = 123,722,267,417.66
  5. Step 5: Solve for x
    x = 123,722,267,417.66/485,391.60
  6. Step 6: Final answer
    x = 254,891.65

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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.