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Finding the Fourth Proportional to 633.86, 874.86 and 354.20

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Solution

The fourth proportional to 633.86, 874.86 and 354.20 is: 488.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.86 : 874.86 = 354.20 : x
  2. Step 2: Convert to fraction form
    633.86/874.86 = 354.20/x
  3. Step 3: Cross multiply
    633.86x = 874.86 × 354.20
  4. Step 4: Simplify right side
    633.86x = 309,871.04
  5. Step 5: Solve for x
    x = 309,871.04/633.86
  6. Step 6: Final answer
    x = 488.87

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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.