Home / 3,478.50-5,217.75-1,426.50

Finding the Fourth Proportional to 3,478.50, 5,217.75 and 1,426.50

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Solution

The fourth proportional to 3,478.50, 5,217.75 and 1,426.50 is: 2,139.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.50 : 5,217.75 = 1,426.50 : x
  2. Step 2: Convert to fraction form
    3,478.50/5,217.75 = 1,426.50/x
  3. Step 3: Cross multiply
    3,478.50x = 5,217.75 × 1,426.50
  4. Step 4: Simplify right side
    3,478.50x = 7,443,120.38
  5. Step 5: Solve for x
    x = 7,443,120.38/3,478.50
  6. Step 6: Final answer
    x = 2,139.75

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Double scale
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Similar ratio
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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.