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Finding the Fourth Proportional to 1,195.55, 1,791.26 and 648.11

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Solution

The fourth proportional to 1,195.55, 1,791.26 and 648.11 is: 971.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.55 : 1,791.26 = 648.11 : x
  2. Step 2: Convert to fraction form
    1,195.55/1,791.26 = 648.11/x
  3. Step 3: Cross multiply
    1,195.55x = 1,791.26 × 648.11
  4. Step 4: Simplify right side
    1,195.55x = 1,160,937.19
  5. Step 5: Solve for x
    x = 1,160,937.19/1,195.55
  6. Step 6: Final answer
    x = 971.05

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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.