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Finding the Fourth Proportional to 591.10, 816.48 and 394.88

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Solution

The fourth proportional to 591.10, 816.48 and 394.88 is: 545.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.10 : 816.48 = 394.88 : x
  2. Step 2: Convert to fraction form
    591.10/816.48 = 394.88/x
  3. Step 3: Cross multiply
    591.10x = 816.48 × 394.88
  4. Step 4: Simplify right side
    591.10x = 322,407.54
  5. Step 5: Solve for x
    x = 322,407.54/591.10
  6. Step 6: Final answer
    x = 545.44

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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.