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Finding the Fourth Proportional to 888.63, 1,332.99 and 311.55

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Solution

The fourth proportional to 888.63, 1,332.99 and 311.55 is: 467.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.63 : 1,332.99 = 311.55 : x
  2. Step 2: Convert to fraction form
    888.63/1,332.99 = 311.55/x
  3. Step 3: Cross multiply
    888.63x = 1,332.99 × 311.55
  4. Step 4: Simplify right side
    888.63x = 415,293.03
  5. Step 5: Solve for x
    x = 415,293.03/888.63
  6. Step 6: Final answer
    x = 467.34

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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.