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Finding the Fourth Proportional to 485,433.20, 728,020.20 and 169,857.20

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Solution

The fourth proportional to 485,433.20, 728,020.20 and 169,857.20 is: 254,740.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,433.20 : 728,020.20 = 169,857.20 : x
  2. Step 2: Convert to fraction form
    485,433.20/728,020.20 = 169,857.20/x
  3. Step 3: Cross multiply
    485,433.20x = 728,020.20 × 169,857.20
  4. Step 4: Simplify right side
    485,433.20x = 123,659,472,715.44
  5. Step 5: Solve for x
    x = 123,659,472,715.44/485,433.20
  6. Step 6: Final answer
    x = 254,740.45

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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.