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Finding the Fourth Proportional to 888.83, 1,332.84 and 311.57

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Solution

The fourth proportional to 888.83, 1,332.84 and 311.57 is: 467.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.83 : 1,332.84 = 311.57 : x
  2. Step 2: Convert to fraction form
    888.83/1,332.84 = 311.57/x
  3. Step 3: Cross multiply
    888.83x = 1,332.84 × 311.57
  4. Step 4: Simplify right side
    888.83x = 415,272.96
  5. Step 5: Solve for x
    x = 415,272.96/888.83
  6. Step 6: Final answer
    x = 467.21

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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.