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Finding the Fourth Proportional to 549.20, 822.20 and 533.20

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Solution

The fourth proportional to 549.20, 822.20 and 533.20 is: 798.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.20 : 822.20 = 533.20 : x
  2. Step 2: Convert to fraction form
    549.20/822.20 = 533.20/x
  3. Step 3: Cross multiply
    549.20x = 822.20 × 533.20
  4. Step 4: Simplify right side
    549.20x = 438,397.04
  5. Step 5: Solve for x
    x = 438,397.04/549.20
  6. Step 6: Final answer
    x = 798.25

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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.