Home / 925.12-1,387.98-438.24

Finding the Fourth Proportional to 925.12, 1,387.98 and 438.24

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Solution

The fourth proportional to 925.12, 1,387.98 and 438.24 is: 657.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.12 : 1,387.98 = 438.24 : x
  2. Step 2: Convert to fraction form
    925.12/1,387.98 = 438.24/x
  3. Step 3: Cross multiply
    925.12x = 1,387.98 × 438.24
  4. Step 4: Simplify right side
    925.12x = 608,268.36
  5. Step 5: Solve for x
    x = 608,268.36/925.12
  6. Step 6: Final answer
    x = 657.50

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1.5x scale

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.