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Finding the Fourth Proportional to 908.13, 1,252.84 and 613.49

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Solution

The fourth proportional to 908.13, 1,252.84 and 613.49 is: 846.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.13 : 1,252.84 = 613.49 : x
  2. Step 2: Convert to fraction form
    908.13/1,252.84 = 613.49/x
  3. Step 3: Cross multiply
    908.13x = 1,252.84 × 613.49
  4. Step 4: Simplify right side
    908.13x = 768,604.81
  5. Step 5: Solve for x
    x = 768,604.81/908.13
  6. Step 6: Final answer
    x = 846.36

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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.