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Finding the Fourth Proportional to 576.72, 865.08 and 381.67

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Solution

The fourth proportional to 576.72, 865.08 and 381.67 is: 572.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.72 : 865.08 = 381.67 : x
  2. Step 2: Convert to fraction form
    576.72/865.08 = 381.67/x
  3. Step 3: Cross multiply
    576.72x = 865.08 × 381.67
  4. Step 4: Simplify right side
    576.72x = 330,175.08
  5. Step 5: Solve for x
    x = 330,175.08/576.72
  6. Step 6: Final answer
    x = 572.51

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.