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Finding the Fourth Proportional to 549.18, 822.44 and 317.57

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Solution

The fourth proportional to 549.18, 822.44 and 317.57 is: 475.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.18 : 822.44 = 317.57 : x
  2. Step 2: Convert to fraction form
    549.18/822.44 = 317.57/x
  3. Step 3: Cross multiply
    549.18x = 822.44 × 317.57
  4. Step 4: Simplify right side
    549.18x = 261,178.95
  5. Step 5: Solve for x
    x = 261,178.95/549.18
  6. Step 6: Final answer
    x = 475.58

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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.