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Finding the Fourth Proportional to 633.56, 872.78 and 493.43

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Solution

The fourth proportional to 633.56, 872.78 and 493.43 is: 679.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.56 : 872.78 = 493.43 : x
  2. Step 2: Convert to fraction form
    633.56/872.78 = 493.43/x
  3. Step 3: Cross multiply
    633.56x = 872.78 × 493.43
  4. Step 4: Simplify right side
    633.56x = 430,649.00
  5. Step 5: Solve for x
    x = 430,649.00/633.56
  6. Step 6: Final answer
    x = 679.73

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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.