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Finding the Fourth Proportional to 591.17, 815.06 and 394.54

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Solution

The fourth proportional to 591.17, 815.06 and 394.54 is: 543.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.17 : 815.06 = 394.54 : x
  2. Step 2: Convert to fraction form
    591.17/815.06 = 394.54/x
  3. Step 3: Cross multiply
    591.17x = 815.06 × 394.54
  4. Step 4: Simplify right side
    591.17x = 321,572.72
  5. Step 5: Solve for x
    x = 321,572.72/591.17
  6. Step 6: Final answer
    x = 543.96

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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.