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Finding the Fourth Proportional to 888.90, 1,330.29 and 613.14

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Solution

The fourth proportional to 888.90, 1,330.29 and 613.14 is: 917.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.90 : 1,330.29 = 613.14 : x
  2. Step 2: Convert to fraction form
    888.90/1,330.29 = 613.14/x
  3. Step 3: Cross multiply
    888.90x = 1,330.29 × 613.14
  4. Step 4: Simplify right side
    888.90x = 815,654.01
  5. Step 5: Solve for x
    x = 815,654.01/888.90
  6. Step 6: Final answer
    x = 917.60

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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.