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Finding the Fourth Proportional to 486.38, 671.06 and 345.44

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Solution

The fourth proportional to 486.38, 671.06 and 345.44 is: 476.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.38 : 671.06 = 345.44 : x
  2. Step 2: Convert to fraction form
    486.38/671.06 = 345.44/x
  3. Step 3: Cross multiply
    486.38x = 671.06 × 345.44
  4. Step 4: Simplify right side
    486.38x = 231,805.88
  5. Step 5: Solve for x
    x = 231,805.88/486.38
  6. Step 6: Final answer
    x = 476.60

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Double scale
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1.5x scale

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.