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Finding the Fourth Proportional to 633.74, 951.28 and 427.59

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Solution

The fourth proportional to 633.74, 951.28 and 427.59 is: 641.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.74 : 951.28 = 427.59 : x
  2. Step 2: Convert to fraction form
    633.74/951.28 = 427.59/x
  3. Step 3: Cross multiply
    633.74x = 951.28 × 427.59
  4. Step 4: Simplify right side
    633.74x = 406,756.75
  5. Step 5: Solve for x
    x = 406,756.75/633.74
  6. Step 6: Final answer
    x = 641.84

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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.