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Finding the Fourth Proportional to 868.22, 1,302.54 and 251.91

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Solution

The fourth proportional to 868.22, 1,302.54 and 251.91 is: 377.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.22 : 1,302.54 = 251.91 : x
  2. Step 2: Convert to fraction form
    868.22/1,302.54 = 251.91/x
  3. Step 3: Cross multiply
    868.22x = 1,302.54 × 251.91
  4. Step 4: Simplify right side
    868.22x = 328,118.34
  5. Step 5: Solve for x
    x = 328,118.34/868.22
  6. Step 6: Final answer
    x = 377.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.