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Finding the Fourth Proportional to 2,839.21, 4,259.22 and 891.56

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Solution

The fourth proportional to 2,839.21, 4,259.22 and 891.56 is: 1,337.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,839.21 : 4,259.22 = 891.56 : x
  2. Step 2: Convert to fraction form
    2,839.21/4,259.22 = 891.56/x
  3. Step 3: Cross multiply
    2,839.21x = 4,259.22 × 891.56
  4. Step 4: Simplify right side
    2,839.21x = 3,797,357.49
  5. Step 5: Solve for x
    x = 3,797,357.49/2,839.21
  6. Step 6: Final answer
    x = 1,337.47

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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.