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Finding the Fourth Proportional to 908.07, 1,361.19 and 868.88

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Solution

The fourth proportional to 908.07, 1,361.19 and 868.88 is: 1,302.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.07 : 1,361.19 = 868.88 : x
  2. Step 2: Convert to fraction form
    908.07/1,361.19 = 868.88/x
  3. Step 3: Cross multiply
    908.07x = 1,361.19 × 868.88
  4. Step 4: Simplify right side
    908.07x = 1,182,710.77
  5. Step 5: Solve for x
    x = 1,182,710.77/908.07
  6. Step 6: Final answer
    x = 1,302.44

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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.