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Finding the Fourth Proportional to 552.39, 828.61 and 187.18

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Solution

The fourth proportional to 552.39, 828.61 and 187.18 is: 280.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.39 : 828.61 = 187.18 : x
  2. Step 2: Convert to fraction form
    552.39/828.61 = 187.18/x
  3. Step 3: Cross multiply
    552.39x = 828.61 × 187.18
  4. Step 4: Simplify right side
    552.39x = 155,101.34
  5. Step 5: Solve for x
    x = 155,101.34/552.39
  6. Step 6: Final answer
    x = 280.78

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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.