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Finding the Fourth Proportional to 486.76, 671.72 and 265.70

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Solution

The fourth proportional to 486.76, 671.72 and 265.70 is: 366.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.76 : 671.72 = 265.70 : x
  2. Step 2: Convert to fraction form
    486.76/671.72 = 265.70/x
  3. Step 3: Cross multiply
    486.76x = 671.72 × 265.70
  4. Step 4: Simplify right side
    486.76x = 178,473.31
  5. Step 5: Solve for x
    x = 178,473.31/486.76
  6. Step 6: Final answer
    x = 366.66

Related Problems

Find fourth proportional to 243.38, 335.86 and 132.85
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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.