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Finding the Fourth Proportional to 485,719.20, 728,044.20 and 170,013.60

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Solution

The fourth proportional to 485,719.20, 728,044.20 and 170,013.60 is: 254,833.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,719.20 : 728,044.20 = 170,013.60 : x
  2. Step 2: Convert to fraction form
    485,719.20/728,044.20 = 170,013.60/x
  3. Step 3: Cross multiply
    485,719.20x = 728,044.20 × 170,013.60
  4. Step 4: Simplify right side
    485,719.20x = 123,777,415,401.12
  5. Step 5: Solve for x
    x = 123,777,415,401.12/485,719.20
  6. Step 6: Final answer
    x = 254,833.28

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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.