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Finding the Fourth Proportional to 576.77, 865.15 and 456.89

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Solution

The fourth proportional to 576.77, 865.15 and 456.89 is: 685.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.77 : 865.15 = 456.89 : x
  2. Step 2: Convert to fraction form
    576.77/865.15 = 456.89/x
  3. Step 3: Cross multiply
    576.77x = 865.15 × 456.89
  4. Step 4: Simplify right side
    576.77x = 395,272.92
  5. Step 5: Solve for x
    x = 395,272.92/576.77
  6. Step 6: Final answer
    x = 685.33

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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.