Home / 378,917.28-567,995.76-129,428.64

Finding the Fourth Proportional to 378,917.28, 567,995.76 and 129,428.64

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Solution

The fourth proportional to 378,917.28, 567,995.76 and 129,428.64 is: 194,013.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,917.28 : 567,995.76 = 129,428.64 : x
  2. Step 2: Convert to fraction form
    378,917.28/567,995.76 = 129,428.64/x
  3. Step 3: Cross multiply
    378,917.28x = 567,995.76 × 129,428.64
  4. Step 4: Simplify right side
    378,917.28x = 73,514,918,742.57
  5. Step 5: Solve for x
    x = 73,514,918,742.57/378,917.28
  6. Step 6: Final answer
    x = 194,013.11

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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.