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Finding the Fourth Proportional to 1,108.05, 1,527.69 and 908.15

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Solution

The fourth proportional to 1,108.05, 1,527.69 and 908.15 is: 1,252.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.05 : 1,527.69 = 908.15 : x
  2. Step 2: Convert to fraction form
    1,108.05/1,527.69 = 908.15/x
  3. Step 3: Cross multiply
    1,108.05x = 1,527.69 × 908.15
  4. Step 4: Simplify right side
    1,108.05x = 1,387,370.12
  5. Step 5: Solve for x
    x = 1,387,370.12/1,108.05
  6. Step 6: Final answer
    x = 1,252.08

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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.