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Finding the Fourth Proportional to 888.06, 1,331.51 and 425.83

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Solution

The fourth proportional to 888.06, 1,331.51 and 425.83 is: 638.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.06 : 1,331.51 = 425.83 : x
  2. Step 2: Convert to fraction form
    888.06/1,331.51 = 425.83/x
  3. Step 3: Cross multiply
    888.06x = 1,331.51 × 425.83
  4. Step 4: Simplify right side
    888.06x = 566,996.90
  5. Step 5: Solve for x
    x = 566,996.90/888.06
  6. Step 6: Final answer
    x = 638.47

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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.