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Finding the Fourth Proportional to 636.73, 955.10 and 431.70

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Solution

The fourth proportional to 636.73, 955.10 and 431.70 is: 647.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.73 : 955.10 = 431.70 : x
  2. Step 2: Convert to fraction form
    636.73/955.10 = 431.70/x
  3. Step 3: Cross multiply
    636.73x = 955.10 × 431.70
  4. Step 4: Simplify right side
    636.73x = 412,316.67
  5. Step 5: Solve for x
    x = 412,316.67/636.73
  6. Step 6: Final answer
    x = 647.55

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.