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Finding the Fourth Proportional to 2,119.86, 3,179.91 and 887.04

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Solution

The fourth proportional to 2,119.86, 3,179.91 and 887.04 is: 1,330.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.86 : 3,179.91 = 887.04 : x
  2. Step 2: Convert to fraction form
    2,119.86/3,179.91 = 887.04/x
  3. Step 3: Cross multiply
    2,119.86x = 3,179.91 × 887.04
  4. Step 4: Simplify right side
    2,119.86x = 2,820,707.37
  5. Step 5: Solve for x
    x = 2,820,707.37/2,119.86
  6. Step 6: Final answer
    x = 1,330.61

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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.