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Finding the Fourth Proportional to 888.60, 1,333.41 and 641.55

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Solution

The fourth proportional to 888.60, 1,333.41 and 641.55 is: 962.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.60 : 1,333.41 = 641.55 : x
  2. Step 2: Convert to fraction form
    888.60/1,333.41 = 641.55/x
  3. Step 3: Cross multiply
    888.60x = 1,333.41 × 641.55
  4. Step 4: Simplify right side
    888.60x = 855,449.19
  5. Step 5: Solve for x
    x = 855,449.19/888.60
  6. Step 6: Final answer
    x = 962.69

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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.