Home / 3,439.21-5,158.82-842.13

Finding the Fourth Proportional to 3,439.21, 5,158.82 and 842.13

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Solution

The fourth proportional to 3,439.21, 5,158.82 and 842.13 is: 1,263.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,439.21 : 5,158.82 = 842.13 : x
  2. Step 2: Convert to fraction form
    3,439.21/5,158.82 = 842.13/x
  3. Step 3: Cross multiply
    3,439.21x = 5,158.82 × 842.13
  4. Step 4: Simplify right side
    3,439.21x = 4,344,397.09
  5. Step 5: Solve for x
    x = 4,344,397.09/3,439.21
  6. Step 6: Final answer
    x = 1,263.20

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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.