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Finding the Fourth Proportional to 814, 1,123.31 and 440.98

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Solution

The fourth proportional to 814, 1,123.31 and 440.98 is: 608.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    814 : 1,123.31 = 440.98 : x
  2. Step 2: Convert to fraction form
    814/1,123.31 = 440.98/x
  3. Step 3: Cross multiply
    814x = 1,123.31 × 440.98
  4. Step 4: Simplify right side
    814x = 495,357.24
  5. Step 5: Solve for x
    x = 495,357.24/814
  6. Step 6: Final answer
    x = 608.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.