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Finding the Fourth Proportional to 2,169.72, 3,251.64 and 999.84

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Solution

The fourth proportional to 2,169.72, 3,251.64 and 999.84 is: 1,498.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.72 : 3,251.64 = 999.84 : x
  2. Step 2: Convert to fraction form
    2,169.72/3,251.64 = 999.84/x
  3. Step 3: Cross multiply
    2,169.72x = 3,251.64 × 999.84
  4. Step 4: Simplify right side
    2,169.72x = 3,251,119.74
  5. Step 5: Solve for x
    x = 3,251,119.74/2,169.72
  6. Step 6: Final answer
    x = 1,498.41

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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.