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Finding the Fourth Proportional to 485,913.20, 728,335.20 and 170,207.60

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Solution

The fourth proportional to 485,913.20, 728,335.20 and 170,207.60 is: 255,124.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,913.20 : 728,335.20 = 170,207.60 : x
  2. Step 2: Convert to fraction form
    485,913.20/728,335.20 = 170,207.60/x
  3. Step 3: Cross multiply
    485,913.20x = 728,335.20 × 170,207.60
  4. Step 4: Simplify right side
    485,913.20x = 123,968,186,387.52
  5. Step 5: Solve for x
    x = 123,968,186,387.52/485,913.20
  6. Step 6: Final answer
    x = 255,124.14

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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.