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Finding the Fourth Proportional to 576.72, 865.62 and 384.48

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Solution

The fourth proportional to 576.72, 865.62 and 384.48 is: 577.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.72 : 865.62 = 384.48 : x
  2. Step 2: Convert to fraction form
    576.72/865.62 = 384.48/x
  3. Step 3: Cross multiply
    576.72x = 865.62 × 384.48
  4. Step 4: Simplify right side
    576.72x = 332,813.58
  5. Step 5: Solve for x
    x = 332,813.58/576.72
  6. Step 6: Final answer
    x = 577.08

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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.