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Finding the Fourth Proportional to 844.90, 1,264.70 and 613.73

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Solution

The fourth proportional to 844.90, 1,264.70 and 613.73 is: 918.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.90 : 1,264.70 = 613.73 : x
  2. Step 2: Convert to fraction form
    844.90/1,264.70 = 613.73/x
  3. Step 3: Cross multiply
    844.90x = 1,264.70 × 613.73
  4. Step 4: Simplify right side
    844.90x = 776,189.03
  5. Step 5: Solve for x
    x = 776,189.03/844.90
  6. Step 6: Final answer
    x = 918.68

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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.