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Finding the Fourth Proportional to 542.50, 814.16 and 398.60

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Solution

The fourth proportional to 542.50, 814.16 and 398.60 is: 598.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.50 : 814.16 = 398.60 : x
  2. Step 2: Convert to fraction form
    542.50/814.16 = 398.60/x
  3. Step 3: Cross multiply
    542.50x = 814.16 × 398.60
  4. Step 4: Simplify right side
    542.50x = 324,524.18
  5. Step 5: Solve for x
    x = 324,524.18/542.50
  6. Step 6: Final answer
    x = 598.20

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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.