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Finding the Fourth Proportional to 552.20, 828.30 and 187.40

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Solution

The fourth proportional to 552.20, 828.30 and 187.40 is: 281.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.20 : 828.30 = 187.40 : x
  2. Step 2: Convert to fraction form
    552.20/828.30 = 187.40/x
  3. Step 3: Cross multiply
    552.20x = 828.30 × 187.40
  4. Step 4: Simplify right side
    552.20x = 155,223.42
  5. Step 5: Solve for x
    x = 155,223.42/552.20
  6. Step 6: Final answer
    x = 281.10

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Double scale
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1.5x scale

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.