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Finding the Fourth Proportional to 2,839.22, 4,259.33 and 989.79

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Solution

The fourth proportional to 2,839.22, 4,259.33 and 989.79 is: 1,484.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,839.22 : 4,259.33 = 989.79 : x
  2. Step 2: Convert to fraction form
    2,839.22/4,259.33 = 989.79/x
  3. Step 3: Cross multiply
    2,839.22x = 4,259.33 × 989.79
  4. Step 4: Simplify right side
    2,839.22x = 4,215,842.24
  5. Step 5: Solve for x
    x = 4,215,842.24/2,839.22
  6. Step 6: Final answer
    x = 1,484.86

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1.5x scale

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.