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Finding the Fourth Proportional to 1,161.03, 1,603.67 and 867.63

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Solution

The fourth proportional to 1,161.03, 1,603.67 and 867.63 is: 1,198.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,161.03 : 1,603.67 = 867.63 : x
  2. Step 2: Convert to fraction form
    1,161.03/1,603.67 = 867.63/x
  3. Step 3: Cross multiply
    1,161.03x = 1,603.67 × 867.63
  4. Step 4: Simplify right side
    1,161.03x = 1,391,387.86
  5. Step 5: Solve for x
    x = 1,391,387.86/1,161.03
  6. Step 6: Final answer
    x = 1,198.41

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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.