Home / 925.02-1,387.38-438.12

Finding the Fourth Proportional to 925.02, 1,387.38 and 438.12

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Solution

The fourth proportional to 925.02, 1,387.38 and 438.12 is: 657.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.02 : 1,387.38 = 438.12 : x
  2. Step 2: Convert to fraction form
    925.02/1,387.38 = 438.12/x
  3. Step 3: Cross multiply
    925.02x = 1,387.38 × 438.12
  4. Step 4: Simplify right side
    925.02x = 607,838.93
  5. Step 5: Solve for x
    x = 607,838.93/925.02
  6. Step 6: Final answer
    x = 657.11

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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.