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Finding the Fourth Proportional to 925.94, 1,388.91 and 439.13

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Solution

The fourth proportional to 925.94, 1,388.91 and 439.13 is: 658.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.94 : 1,388.91 = 439.13 : x
  2. Step 2: Convert to fraction form
    925.94/1,388.91 = 439.13/x
  3. Step 3: Cross multiply
    925.94x = 1,388.91 × 439.13
  4. Step 4: Simplify right side
    925.94x = 609,912.05
  5. Step 5: Solve for x
    x = 609,912.05/925.94
  6. Step 6: Final answer
    x = 658.70

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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.