Home / 2,587.60-3,878.96-1,287.84

Finding the Fourth Proportional to 2,587.60, 3,878.96 and 1,287.84

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Solution

The fourth proportional to 2,587.60, 3,878.96 and 1,287.84 is: 1,930.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.60 : 3,878.96 = 1,287.84 : x
  2. Step 2: Convert to fraction form
    2,587.60/3,878.96 = 1,287.84/x
  3. Step 3: Cross multiply
    2,587.60x = 3,878.96 × 1,287.84
  4. Step 4: Simplify right side
    2,587.60x = 4,995,479.85
  5. Step 5: Solve for x
    x = 4,995,479.85/2,587.60
  6. Step 6: Final answer
    x = 1,930.55

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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.