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Finding the Fourth Proportional to 922.89, 1,377.56 and 814.76

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Solution

The fourth proportional to 922.89, 1,377.56 and 814.76 is: 1,216.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.89 : 1,377.56 = 814.76 : x
  2. Step 2: Convert to fraction form
    922.89/1,377.56 = 814.76/x
  3. Step 3: Cross multiply
    922.89x = 1,377.56 × 814.76
  4. Step 4: Simplify right side
    922.89x = 1,122,369.82
  5. Step 5: Solve for x
    x = 1,122,369.82/922.89
  6. Step 6: Final answer
    x = 1,216.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.