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Finding the Fourth Proportional to 549.12, 823.68 and 220.11

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Solution

The fourth proportional to 549.12, 823.68 and 220.11 is: 330.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.12 : 823.68 = 220.11 : x
  2. Step 2: Convert to fraction form
    549.12/823.68 = 220.11/x
  3. Step 3: Cross multiply
    549.12x = 823.68 × 220.11
  4. Step 4: Simplify right side
    549.12x = 181,300.20
  5. Step 5: Solve for x
    x = 181,300.20/549.12
  6. Step 6: Final answer
    x = 330.17

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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.