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Finding the Fourth Proportional to 2,111.95, 3,167.93 and 879.34

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Solution

The fourth proportional to 2,111.95, 3,167.93 and 879.34 is: 1,319.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,111.95 : 3,167.93 = 879.34 : x
  2. Step 2: Convert to fraction form
    2,111.95/3,167.93 = 879.34/x
  3. Step 3: Cross multiply
    2,111.95x = 3,167.93 × 879.34
  4. Step 4: Simplify right side
    2,111.95x = 2,785,687.57
  5. Step 5: Solve for x
    x = 2,785,687.57/2,111.95
  6. Step 6: Final answer
    x = 1,319.01

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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.