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Finding the Fourth Proportional to 1,105.85, 1,526.09 and 608.48

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Solution

The fourth proportional to 1,105.85, 1,526.09 and 608.48 is: 839.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.85 : 1,526.09 = 608.48 : x
  2. Step 2: Convert to fraction form
    1,105.85/1,526.09 = 608.48/x
  3. Step 3: Cross multiply
    1,105.85x = 1,526.09 × 608.48
  4. Step 4: Simplify right side
    1,105.85x = 928,593.15
  5. Step 5: Solve for x
    x = 928,593.15/1,105.85
  6. Step 6: Final answer
    x = 839.71

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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.