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Finding the Fourth Proportional to 549.32, 822.66 and 317.64

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Solution

The fourth proportional to 549.32, 822.66 and 317.64 is: 475.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.32 : 822.66 = 317.64 : x
  2. Step 2: Convert to fraction form
    549.32/822.66 = 317.64/x
  3. Step 3: Cross multiply
    549.32x = 822.66 × 317.64
  4. Step 4: Simplify right side
    549.32x = 261,309.72
  5. Step 5: Solve for x
    x = 261,309.72/549.32
  6. Step 6: Final answer
    x = 475.70

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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.