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Finding the Fourth Proportional to 485,666.48, 728,443.68 and 130,652.60

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Solution

The fourth proportional to 485,666.48, 728,443.68 and 130,652.60 is: 195,963.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,666.48 : 728,443.68 = 130,652.60 : x
  2. Step 2: Convert to fraction form
    485,666.48/728,443.68 = 130,652.60/x
  3. Step 3: Cross multiply
    485,666.48x = 728,443.68 × 130,652.60
  4. Step 4: Simplify right side
    485,666.48x = 95,173,057,348.32
  5. Step 5: Solve for x
    x = 95,173,057,348.32/485,666.48
  6. Step 6: Final answer
    x = 195,963.82

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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.