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Finding the Fourth Proportional to 633.55, 874.34 and 353.79

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Solution

The fourth proportional to 633.55, 874.34 and 353.79 is: 488.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.55 : 874.34 = 353.79 : x
  2. Step 2: Convert to fraction form
    633.55/874.34 = 353.79/x
  3. Step 3: Cross multiply
    633.55x = 874.34 × 353.79
  4. Step 4: Simplify right side
    633.55x = 309,336.76
  5. Step 5: Solve for x
    x = 309,336.76/633.55
  6. Step 6: Final answer
    x = 488.26

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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.