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Finding the Fourth Proportional to 888.17, 1,329.67 and 613.73

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Solution

The fourth proportional to 888.17, 1,329.67 and 613.73 is: 918.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.17 : 1,329.67 = 613.73 : x
  2. Step 2: Convert to fraction form
    888.17/1,329.67 = 613.73/x
  3. Step 3: Cross multiply
    888.17x = 1,329.67 × 613.73
  4. Step 4: Simplify right side
    888.17x = 816,051.53
  5. Step 5: Solve for x
    x = 816,051.53/888.17
  6. Step 6: Final answer
    x = 918.81

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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.