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Finding the Fourth Proportional to 2,619.76, 3,930.72 and 887.44

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Solution

The fourth proportional to 2,619.76, 3,930.72 and 887.44 is: 1,331.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.76 : 3,930.72 = 887.44 : x
  2. Step 2: Convert to fraction form
    2,619.76/3,930.72 = 887.44/x
  3. Step 3: Cross multiply
    2,619.76x = 3,930.72 × 887.44
  4. Step 4: Simplify right side
    2,619.76x = 3,488,278.16
  5. Step 5: Solve for x
    x = 3,488,278.16/2,619.76
  6. Step 6: Final answer
    x = 1,331.53

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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.