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Finding the Fourth Proportional to 633.60, 875.28 and 628.72

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Solution

The fourth proportional to 633.60, 875.28 and 628.72 is: 868.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.60 : 875.28 = 628.72 : x
  2. Step 2: Convert to fraction form
    633.60/875.28 = 628.72/x
  3. Step 3: Cross multiply
    633.60x = 875.28 × 628.72
  4. Step 4: Simplify right side
    633.60x = 550,306.04
  5. Step 5: Solve for x
    x = 550,306.04/633.60
  6. Step 6: Final answer
    x = 868.54

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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.