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Finding the Fourth Proportional to 633.90, 874.58 and 371.76

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Solution

The fourth proportional to 633.90, 874.58 and 371.76 is: 512.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.90 : 874.58 = 371.76 : x
  2. Step 2: Convert to fraction form
    633.90/874.58 = 371.76/x
  3. Step 3: Cross multiply
    633.90x = 874.58 × 371.76
  4. Step 4: Simplify right side
    633.90x = 325,133.86
  5. Step 5: Solve for x
    x = 325,133.86/633.90
  6. Step 6: Final answer
    x = 512.91

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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.