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Finding the Fourth Proportional to 555.72, 834.03 and 394.43

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Solution

The fourth proportional to 555.72, 834.03 and 394.43 is: 591.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.72 : 834.03 = 394.43 : x
  2. Step 2: Convert to fraction form
    555.72/834.03 = 394.43/x
  3. Step 3: Cross multiply
    555.72x = 834.03 × 394.43
  4. Step 4: Simplify right side
    555.72x = 328,962.28
  5. Step 5: Solve for x
    x = 328,962.28/555.72
  6. Step 6: Final answer
    x = 591.96

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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.