Home / 2,159.32-3,240.60-860.08

Finding the Fourth Proportional to 2,159.32, 3,240.60 and 860.08

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Solution

The fourth proportional to 2,159.32, 3,240.60 and 860.08 is: 1,290.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.32 : 3,240.60 = 860.08 : x
  2. Step 2: Convert to fraction form
    2,159.32/3,240.60 = 860.08/x
  3. Step 3: Cross multiply
    2,159.32x = 3,240.60 × 860.08
  4. Step 4: Simplify right side
    2,159.32x = 2,787,175.25
  5. Step 5: Solve for x
    x = 2,787,175.25/2,159.32
  6. Step 6: Final answer
    x = 1,290.77

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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.