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Finding the Fourth Proportional to 888.08, 1,331.76 and 471.20

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Solution

The fourth proportional to 888.08, 1,331.76 and 471.20 is: 706.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.08 : 1,331.76 = 471.20 : x
  2. Step 2: Convert to fraction form
    888.08/1,331.76 = 471.20/x
  3. Step 3: Cross multiply
    888.08x = 1,331.76 × 471.20
  4. Step 4: Simplify right side
    888.08x = 627,525.31
  5. Step 5: Solve for x
    x = 627,525.31/888.08
  6. Step 6: Final answer
    x = 706.61

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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.