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Finding the Fourth Proportional to 888.87, 1,333.91 and 311.74

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Solution

The fourth proportional to 888.87, 1,333.91 and 311.74 is: 467.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.87 : 1,333.91 = 311.74 : x
  2. Step 2: Convert to fraction form
    888.87/1,333.91 = 311.74/x
  3. Step 3: Cross multiply
    888.87x = 1,333.91 × 311.74
  4. Step 4: Simplify right side
    888.87x = 415,833.10
  5. Step 5: Solve for x
    x = 415,833.10/888.87
  6. Step 6: Final answer
    x = 467.82

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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.