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Finding the Fourth Proportional to 927.16, 1,391.10 and 562.21

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Solution

The fourth proportional to 927.16, 1,391.10 and 562.21 is: 843.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.16 : 1,391.10 = 562.21 : x
  2. Step 2: Convert to fraction form
    927.16/1,391.10 = 562.21/x
  3. Step 3: Cross multiply
    927.16x = 1,391.10 × 562.21
  4. Step 4: Simplify right side
    927.16x = 782,080.56
  5. Step 5: Solve for x
    x = 782,080.56/927.16
  6. Step 6: Final answer
    x = 843.53

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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.