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Finding the Fourth Proportional to 486.75, 671.72 and 265.72

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Solution

The fourth proportional to 486.75, 671.72 and 265.72 is: 366.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.75 : 671.72 = 265.72 : x
  2. Step 2: Convert to fraction form
    486.75/671.72 = 265.72/x
  3. Step 3: Cross multiply
    486.75x = 671.72 × 265.72
  4. Step 4: Simplify right side
    486.75x = 178,488.42
  5. Step 5: Solve for x
    x = 178,488.42/486.75
  6. Step 6: Final answer
    x = 366.69

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Find fourth proportional to 243.38, 335.86 and 132.86
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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.