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Finding the Fourth Proportional to 485,427.01, 728,139.89 and 130,441.04

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Solution

The fourth proportional to 485,427.01, 728,139.89 and 130,441.04 is: 195,661.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,427.01 : 728,139.89 = 130,441.04 : x
  2. Step 2: Convert to fraction form
    485,427.01/728,139.89 = 130,441.04/x
  3. Step 3: Cross multiply
    485,427.01x = 728,139.89 × 130,441.04
  4. Step 4: Simplify right side
    485,427.01x = 94,979,320,550.28
  5. Step 5: Solve for x
    x = 94,979,320,550.28/485,427.01
  6. Step 6: Final answer
    x = 195,661.38

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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.