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Finding the Fourth Proportional to 868.63, 1,302.74 and 252.17

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Solution

The fourth proportional to 868.63, 1,302.74 and 252.17 is: 378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.63 : 1,302.74 = 252.17 : x
  2. Step 2: Convert to fraction form
    868.63/1,302.74 = 252.17/x
  3. Step 3: Cross multiply
    868.63x = 1,302.74 × 252.17
  4. Step 4: Simplify right side
    868.63x = 328,511.95
  5. Step 5: Solve for x
    x = 328,511.95/868.63
  6. Step 6: Final answer
    x = 378.20

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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.