Home / 925.20-1,387.80-632.79

Finding the Fourth Proportional to 925.20, 1,387.80 and 632.79

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Solution

The fourth proportional to 925.20, 1,387.80 and 632.79 is: 949.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.20 : 1,387.80 = 632.79 : x
  2. Step 2: Convert to fraction form
    925.20/1,387.80 = 632.79/x
  3. Step 3: Cross multiply
    925.20x = 1,387.80 × 632.79
  4. Step 4: Simplify right side
    925.20x = 878,185.96
  5. Step 5: Solve for x
    x = 878,185.96/925.20
  6. Step 6: Final answer
    x = 949.19

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Double scale
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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.