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Finding the Fourth Proportional to 1,347.86, 1,855.37 and 1,161.97

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Solution

The fourth proportional to 1,347.86, 1,855.37 and 1,161.97 is: 1,599.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.86 : 1,855.37 = 1,161.97 : x
  2. Step 2: Convert to fraction form
    1,347.86/1,855.37 = 1,161.97/x
  3. Step 3: Cross multiply
    1,347.86x = 1,855.37 × 1,161.97
  4. Step 4: Simplify right side
    1,347.86x = 2,155,882.55
  5. Step 5: Solve for x
    x = 2,155,882.55/1,347.86
  6. Step 6: Final answer
    x = 1,599.48

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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.