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Finding the Fourth Proportional to 633.56, 874.68 and 421.04

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Solution

The fourth proportional to 633.56, 874.68 and 421.04 is: 581.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.56 : 874.68 = 421.04 : x
  2. Step 2: Convert to fraction form
    633.56/874.68 = 421.04/x
  3. Step 3: Cross multiply
    633.56x = 874.68 × 421.04
  4. Step 4: Simplify right side
    633.56x = 368,273.16
  5. Step 5: Solve for x
    x = 368,273.16/633.56
  6. Step 6: Final answer
    x = 581.28

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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.