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Finding the Fourth Proportional to 814.37, 1,123.97 and 482.81

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Solution

The fourth proportional to 814.37, 1,123.97 and 482.81 is: 666.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.37 : 1,123.97 = 482.81 : x
  2. Step 2: Convert to fraction form
    814.37/1,123.97 = 482.81/x
  3. Step 3: Cross multiply
    814.37x = 1,123.97 × 482.81
  4. Step 4: Simplify right side
    814.37x = 542,655.92
  5. Step 5: Solve for x
    x = 542,655.92/814.37
  6. Step 6: Final answer
    x = 666.35

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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.