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Finding the Fourth Proportional to 814.28, 1,123.62 and 482.60

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Solution

The fourth proportional to 814.28, 1,123.62 and 482.60 is: 665.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.28 : 1,123.62 = 482.60 : x
  2. Step 2: Convert to fraction form
    814.28/1,123.62 = 482.60/x
  3. Step 3: Cross multiply
    814.28x = 1,123.62 × 482.60
  4. Step 4: Simplify right side
    814.28x = 542,259.01
  5. Step 5: Solve for x
    x = 542,259.01/814.28
  6. Step 6: Final answer
    x = 665.94

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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.