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Finding the Fourth Proportional to 485,421.20, 728,002.20 and 169,845.20

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Solution

The fourth proportional to 485,421.20, 728,002.20 and 169,845.20 is: 254,722.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,421.20 : 728,002.20 = 169,845.20 : x
  2. Step 2: Convert to fraction form
    485,421.20/728,002.20 = 169,845.20/x
  3. Step 3: Cross multiply
    485,421.20x = 728,002.20 × 169,845.20
  4. Step 4: Simplify right side
    485,421.20x = 123,647,679,259.44
  5. Step 5: Solve for x
    x = 123,647,679,259.44/485,421.20
  6. Step 6: Final answer
    x = 254,722.45

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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.