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Finding the Fourth Proportional to 461.67, 635.65 and 391.58

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Solution

The fourth proportional to 461.67, 635.65 and 391.58 is: 539.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.67 : 635.65 = 391.58 : x
  2. Step 2: Convert to fraction form
    461.67/635.65 = 391.58/x
  3. Step 3: Cross multiply
    461.67x = 635.65 × 391.58
  4. Step 4: Simplify right side
    461.67x = 248,908.44
  5. Step 5: Solve for x
    x = 248,908.44/461.67
  6. Step 6: Final answer
    x = 539.15

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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.