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Finding the Fourth Proportional to 576.11, 863.15 and 554.78

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Solution

The fourth proportional to 576.11, 863.15 and 554.78 is: 831.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.11 : 863.15 = 554.78 : x
  2. Step 2: Convert to fraction form
    576.11/863.15 = 554.78/x
  3. Step 3: Cross multiply
    576.11x = 863.15 × 554.78
  4. Step 4: Simplify right side
    576.11x = 478,851.27
  5. Step 5: Solve for x
    x = 478,851.27/576.11
  6. Step 6: Final answer
    x = 831.19

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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.