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Finding the Fourth Proportional to 1,186.22, 1,775.82 and 876.01

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Solution

The fourth proportional to 1,186.22, 1,775.82 and 876.01 is: 1,311.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.22 : 1,775.82 = 876.01 : x
  2. Step 2: Convert to fraction form
    1,186.22/1,775.82 = 876.01/x
  3. Step 3: Cross multiply
    1,186.22x = 1,775.82 × 876.01
  4. Step 4: Simplify right side
    1,186.22x = 1,555,641.58
  5. Step 5: Solve for x
    x = 1,555,641.58/1,186.22
  6. Step 6: Final answer
    x = 1,311.43

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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.