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Finding the Fourth Proportional to 461.66, 635.61 and 438.57

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Solution

The fourth proportional to 461.66, 635.61 and 438.57 is: 603.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.66 : 635.61 = 438.57 : x
  2. Step 2: Convert to fraction form
    461.66/635.61 = 438.57/x
  3. Step 3: Cross multiply
    461.66x = 635.61 × 438.57
  4. Step 4: Simplify right side
    461.66x = 278,761.12
  5. Step 5: Solve for x
    x = 278,761.12/461.66
  6. Step 6: Final answer
    x = 603.83

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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.