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Finding the Fourth Proportional to 485,420.20, 728,000.70 and 169,844.20

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Solution

The fourth proportional to 485,420.20, 728,000.70 and 169,844.20 is: 254,720.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,420.20 : 728,000.70 = 169,844.20 : x
  2. Step 2: Convert to fraction form
    485,420.20/728,000.70 = 169,844.20/x
  3. Step 3: Cross multiply
    485,420.20x = 728,000.70 × 169,844.20
  4. Step 4: Simplify right side
    485,420.20x = 123,646,696,490.94
  5. Step 5: Solve for x
    x = 123,646,696,490.94/485,420.20
  6. Step 6: Final answer
    x = 254,720.95

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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.