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Finding the Fourth Proportional to 549.46, 823.28 and 386.35

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Solution

The fourth proportional to 549.46, 823.28 and 386.35 is: 578.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.46 : 823.28 = 386.35 : x
  2. Step 2: Convert to fraction form
    549.46/823.28 = 386.35/x
  3. Step 3: Cross multiply
    549.46x = 823.28 × 386.35
  4. Step 4: Simplify right side
    549.46x = 318,070.24
  5. Step 5: Solve for x
    x = 318,070.24/549.46
  6. Step 6: Final answer
    x = 578.88

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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.