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Finding the Fourth Proportional to 576.61, 863.78 and 381.02

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Solution

The fourth proportional to 576.61, 863.78 and 381.02 is: 570.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.61 : 863.78 = 381.02 : x
  2. Step 2: Convert to fraction form
    576.61/863.78 = 381.02/x
  3. Step 3: Cross multiply
    576.61x = 863.78 × 381.02
  4. Step 4: Simplify right side
    576.61x = 329,111.23
  5. Step 5: Solve for x
    x = 329,111.23/576.61
  6. Step 6: Final answer
    x = 570.77

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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.