Home / 485,845.11-728,872.09-148,909.01

Finding the Fourth Proportional to 485,845.11, 728,872.09 and 148,909.01

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Solution

The fourth proportional to 485,845.11, 728,872.09 and 148,909.01 is: 223,395.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,845.11 : 728,872.09 = 148,909.01 : x
  2. Step 2: Convert to fraction form
    485,845.11/728,872.09 = 148,909.01/x
  3. Step 3: Cross multiply
    485,845.11x = 728,872.09 × 148,909.01
  4. Step 4: Simplify right side
    485,845.11x = 108,535,617,321.90
  5. Step 5: Solve for x
    x = 108,535,617,321.90/485,845.11
  6. Step 6: Final answer
    x = 223,395.51

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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.