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Finding the Fourth Proportional to 549.16, 757.86 and 316.28

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Solution

The fourth proportional to 549.16, 757.86 and 316.28 is: 436.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.16 : 757.86 = 316.28 : x
  2. Step 2: Convert to fraction form
    549.16/757.86 = 316.28/x
  3. Step 3: Cross multiply
    549.16x = 757.86 × 316.28
  4. Step 4: Simplify right side
    549.16x = 239,695.96
  5. Step 5: Solve for x
    x = 239,695.96/549.16
  6. Step 6: Final answer
    x = 436.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.