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Finding the Fourth Proportional to 548.60, 822.90 and 354.20

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Solution

The fourth proportional to 548.60, 822.90 and 354.20 is: 531.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.60 : 822.90 = 354.20 : x
  2. Step 2: Convert to fraction form
    548.60/822.90 = 354.20/x
  3. Step 3: Cross multiply
    548.60x = 822.90 × 354.20
  4. Step 4: Simplify right side
    548.60x = 291,471.18
  5. Step 5: Solve for x
    x = 291,471.18/548.60
  6. Step 6: Final answer
    x = 531.30

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Similar ratio
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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.