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Finding the Fourth Proportional to 844.96, 1,267.56 and 642.04

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Solution

The fourth proportional to 844.96, 1,267.56 and 642.04 is: 963.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.96 : 1,267.56 = 642.04 : x
  2. Step 2: Convert to fraction form
    844.96/1,267.56 = 642.04/x
  3. Step 3: Cross multiply
    844.96x = 1,267.56 × 642.04
  4. Step 4: Simplify right side
    844.96x = 813,824.22
  5. Step 5: Solve for x
    x = 813,824.22/844.96
  6. Step 6: Final answer
    x = 963.15

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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.