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Finding the Fourth Proportional to 394.46, 544.43 and 316.29

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Solution

The fourth proportional to 394.46, 544.43 and 316.29 is: 436.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.46 : 544.43 = 316.29 : x
  2. Step 2: Convert to fraction form
    394.46/544.43 = 316.29/x
  3. Step 3: Cross multiply
    394.46x = 544.43 × 316.29
  4. Step 4: Simplify right side
    394.46x = 172,197.76
  5. Step 5: Solve for x
    x = 172,197.76/394.46
  6. Step 6: Final answer
    x = 436.54

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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.