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Finding the Fourth Proportional to 927.12, 1,388.97 and 634.62

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Solution

The fourth proportional to 927.12, 1,388.97 and 634.62 is: 950.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.12 : 1,388.97 = 634.62 : x
  2. Step 2: Convert to fraction form
    927.12/1,388.97 = 634.62/x
  3. Step 3: Cross multiply
    927.12x = 1,388.97 × 634.62
  4. Step 4: Simplify right side
    927.12x = 881,468.14
  5. Step 5: Solve for x
    x = 881,468.14/927.12
  6. Step 6: Final answer
    x = 950.76

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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.