Home / 2,126.39-3,190.12-665.55

Finding the Fourth Proportional to 2,126.39, 3,190.12 and 665.55

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Solution

The fourth proportional to 2,126.39, 3,190.12 and 665.55 is: 998.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.39 : 3,190.12 = 665.55 : x
  2. Step 2: Convert to fraction form
    2,126.39/3,190.12 = 665.55/x
  3. Step 3: Cross multiply
    2,126.39x = 3,190.12 × 665.55
  4. Step 4: Simplify right side
    2,126.39x = 2,123,182.70
  5. Step 5: Solve for x
    x = 2,123,182.70/2,126.39
  6. Step 6: Final answer
    x = 998.49

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Double scale
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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.