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Finding the Fourth Proportional to 485,722.20, 728,583.30 and 170,138.10

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Solution

The fourth proportional to 485,722.20, 728,583.30 and 170,138.10 is: 255,207.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,722.20 : 728,583.30 = 170,138.10 : x
  2. Step 2: Convert to fraction form
    485,722.20/728,583.30 = 170,138.10/x
  3. Step 3: Cross multiply
    485,722.20x = 728,583.30 × 170,138.10
  4. Step 4: Simplify right side
    485,722.20x = 123,959,778,353.73
  5. Step 5: Solve for x
    x = 123,959,778,353.73/485,722.20
  6. Step 6: Final answer
    x = 255,207.15

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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.