Home / 2,272.78-3,137.03-1,278.38

Finding the Fourth Proportional to 2,272.78, 3,137.03 and 1,278.38

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Solution

The fourth proportional to 2,272.78, 3,137.03 and 1,278.38 is: 1,764.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,272.78 : 3,137.03 = 1,278.38 : x
  2. Step 2: Convert to fraction form
    2,272.78/3,137.03 = 1,278.38/x
  3. Step 3: Cross multiply
    2,272.78x = 3,137.03 × 1,278.38
  4. Step 4: Simplify right side
    2,272.78x = 4,010,316.41
  5. Step 5: Solve for x
    x = 4,010,316.41/2,272.78
  6. Step 6: Final answer
    x = 1,764.50

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Half scale
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Double scale
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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.