Home / 925.12-1,387.82-438.13

Finding the Fourth Proportional to 925.12, 1,387.82 and 438.13

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Solution

The fourth proportional to 925.12, 1,387.82 and 438.13 is: 657.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.12 : 1,387.82 = 438.13 : x
  2. Step 2: Convert to fraction form
    925.12/1,387.82 = 438.13/x
  3. Step 3: Cross multiply
    925.12x = 1,387.82 × 438.13
  4. Step 4: Simplify right side
    925.12x = 608,045.58
  5. Step 5: Solve for x
    x = 608,045.58/925.12
  6. Step 6: Final answer
    x = 657.26

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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.