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Finding the Fourth Proportional to 2,093.52, 3,140.28 and 861.06

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Solution

The fourth proportional to 2,093.52, 3,140.28 and 861.06 is: 1,291.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,093.52 : 3,140.28 = 861.06 : x
  2. Step 2: Convert to fraction form
    2,093.52/3,140.28 = 861.06/x
  3. Step 3: Cross multiply
    2,093.52x = 3,140.28 × 861.06
  4. Step 4: Simplify right side
    2,093.52x = 2,703,955.99
  5. Step 5: Solve for x
    x = 2,703,955.99/2,093.52
  6. Step 6: Final answer
    x = 1,291.58

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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.