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Finding the Fourth Proportional to 814.19, 1,123.52 and 482.57

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Solution

The fourth proportional to 814.19, 1,123.52 and 482.57 is: 665.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.19 : 1,123.52 = 482.57 : x
  2. Step 2: Convert to fraction form
    814.19/1,123.52 = 482.57/x
  3. Step 3: Cross multiply
    814.19x = 1,123.52 × 482.57
  4. Step 4: Simplify right side
    814.19x = 542,169.02
  5. Step 5: Solve for x
    x = 542,169.02/814.19
  6. Step 6: Final answer
    x = 665.90

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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.