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Finding the Fourth Proportional to 1,169.17, 1,750.11 and 861.37

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Solution

The fourth proportional to 1,169.17, 1,750.11 and 861.37 is: 1,289.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169.17 : 1,750.11 = 861.37 : x
  2. Step 2: Convert to fraction form
    1,169.17/1,750.11 = 861.37/x
  3. Step 3: Cross multiply
    1,169.17x = 1,750.11 × 861.37
  4. Step 4: Simplify right side
    1,169.17x = 1,507,492.25
  5. Step 5: Solve for x
    x = 1,507,492.25/1,169.17
  6. Step 6: Final answer
    x = 1,289.37

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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.