Home / 3,000.40-4,138.76-2,336.20

Finding the Fourth Proportional to 3,000.40, 4,138.76 and 2,336.20

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Solution

The fourth proportional to 3,000.40, 4,138.76 and 2,336.20 is: 3,222.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,000.40 : 4,138.76 = 2,336.20 : x
  2. Step 2: Convert to fraction form
    3,000.40/4,138.76 = 2,336.20/x
  3. Step 3: Cross multiply
    3,000.40x = 4,138.76 × 2,336.20
  4. Step 4: Simplify right side
    3,000.40x = 9,668,971.11
  5. Step 5: Solve for x
    x = 9,668,971.11/3,000.40
  6. Step 6: Final answer
    x = 3,222.56

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.