Home / 316,387.20-474,305.28-129,279.36

Finding the Fourth Proportional to 316,387.20, 474,305.28 and 129,279.36

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Solution

The fourth proportional to 316,387.20, 474,305.28 and 129,279.36 is: 193,806.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,387.20 : 474,305.28 = 129,279.36 : x
  2. Step 2: Convert to fraction form
    316,387.20/474,305.28 = 129,279.36/x
  3. Step 3: Cross multiply
    316,387.20x = 474,305.28 × 129,279.36
  4. Step 4: Simplify right side
    316,387.20x = 61,317,883,043.02
  5. Step 5: Solve for x
    x = 61,317,883,043.02/316,387.20
  6. Step 6: Final answer
    x = 193,806.46

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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.