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Finding the Fourth Proportional to 888.70, 1,333.64 and 311.57

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Solution

The fourth proportional to 888.70, 1,333.64 and 311.57 is: 467.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.70 : 1,333.64 = 311.57 : x
  2. Step 2: Convert to fraction form
    888.70/1,333.64 = 311.57/x
  3. Step 3: Cross multiply
    888.70x = 1,333.64 × 311.57
  4. Step 4: Simplify right side
    888.70x = 415,520.66
  5. Step 5: Solve for x
    x = 415,520.66/888.70
  6. Step 6: Final answer
    x = 467.56

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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.