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Finding the Fourth Proportional to 576.54, 864.79 and 143.70

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Solution

The fourth proportional to 576.54, 864.79 and 143.70 is: 215.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.54 : 864.79 = 143.70 : x
  2. Step 2: Convert to fraction form
    576.54/864.79 = 143.70/x
  3. Step 3: Cross multiply
    576.54x = 864.79 × 143.70
  4. Step 4: Simplify right side
    576.54x = 124,270.32
  5. Step 5: Solve for x
    x = 124,270.32/576.54
  6. Step 6: Final answer
    x = 215.55

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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.