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Finding the Fourth Proportional to 549.22, 821.92 and 340.90

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Solution

The fourth proportional to 549.22, 821.92 and 340.90 is: 510.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.22 : 821.92 = 340.90 : x
  2. Step 2: Convert to fraction form
    549.22/821.92 = 340.90/x
  3. Step 3: Cross multiply
    549.22x = 821.92 × 340.90
  4. Step 4: Simplify right side
    549.22x = 280,192.53
  5. Step 5: Solve for x
    x = 280,192.53/549.22
  6. Step 6: Final answer
    x = 510.16

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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.