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Finding the Fourth Proportional to 888.38, 1,330.53 and 426.48

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Solution

The fourth proportional to 888.38, 1,330.53 and 426.48 is: 638.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.38 : 1,330.53 = 426.48 : x
  2. Step 2: Convert to fraction form
    888.38/1,330.53 = 426.48/x
  3. Step 3: Cross multiply
    888.38x = 1,330.53 × 426.48
  4. Step 4: Simplify right side
    888.38x = 567,444.43
  5. Step 5: Solve for x
    x = 567,444.43/888.38
  6. Step 6: Final answer
    x = 638.74

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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.