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Finding the Fourth Proportional to 925.87, 1,388.37 and 633.46

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Solution

The fourth proportional to 925.87, 1,388.37 and 633.46 is: 949.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.87 : 1,388.37 = 633.46 : x
  2. Step 2: Convert to fraction form
    925.87/1,388.37 = 633.46/x
  3. Step 3: Cross multiply
    925.87x = 1,388.37 × 633.46
  4. Step 4: Simplify right side
    925.87x = 879,476.86
  5. Step 5: Solve for x
    x = 879,476.86/925.87
  6. Step 6: Final answer
    x = 949.89

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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.