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Finding the Fourth Proportional to 844.74, 1,267.80 and 613.74

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Solution

The fourth proportional to 844.74, 1,267.80 and 613.74 is: 921.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.74 : 1,267.80 = 613.74 : x
  2. Step 2: Convert to fraction form
    844.74/1,267.80 = 613.74/x
  3. Step 3: Cross multiply
    844.74x = 1,267.80 × 613.74
  4. Step 4: Simplify right side
    844.74x = 778,099.57
  5. Step 5: Solve for x
    x = 778,099.57/844.74
  6. Step 6: Final answer
    x = 921.11

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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.