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Finding the Fourth Proportional to 3,087, 4,260.06 and 1,689.75

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Solution

The fourth proportional to 3,087, 4,260.06 and 1,689.75 is: 2,331.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,087 : 4,260.06 = 1,689.75 : x
  2. Step 2: Convert to fraction form
    3,087/4,260.06 = 1,689.75/x
  3. Step 3: Cross multiply
    3,087x = 4,260.06 × 1,689.75
  4. Step 4: Simplify right side
    3,087x = 7,198,436.39
  5. Step 5: Solve for x
    x = 7,198,436.39/3,087
  6. Step 6: Final answer
    x = 2,331.86

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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.