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Finding the Fourth Proportional to 576.98, 865.32 and 211.70

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Solution

The fourth proportional to 576.98, 865.32 and 211.70 is: 317.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.98 : 865.32 = 211.70 : x
  2. Step 2: Convert to fraction form
    576.98/865.32 = 211.70/x
  3. Step 3: Cross multiply
    576.98x = 865.32 × 211.70
  4. Step 4: Simplify right side
    576.98x = 183,188.24
  5. Step 5: Solve for x
    x = 183,188.24/576.98
  6. Step 6: Final answer
    x = 317.49

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Double scale
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Similar ratio
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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.