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Finding the Fourth Proportional to 814.17, 1,219.44 and 631.02

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Solution

The fourth proportional to 814.17, 1,219.44 and 631.02 is: 945.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.17 : 1,219.44 = 631.02 : x
  2. Step 2: Convert to fraction form
    814.17/1,219.44 = 631.02/x
  3. Step 3: Cross multiply
    814.17x = 1,219.44 × 631.02
  4. Step 4: Simplify right side
    814.17x = 769,491.03
  5. Step 5: Solve for x
    x = 769,491.03/814.17
  6. Step 6: Final answer
    x = 945.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.