Home / 2,587.20-3,878.64-1,289.52

Finding the Fourth Proportional to 2,587.20, 3,878.64 and 1,289.52

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Solution

The fourth proportional to 2,587.20, 3,878.64 and 1,289.52 is: 1,933.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.20 : 3,878.64 = 1,289.52 : x
  2. Step 2: Convert to fraction form
    2,587.20/3,878.64 = 1,289.52/x
  3. Step 3: Cross multiply
    2,587.20x = 3,878.64 × 1,289.52
  4. Step 4: Simplify right side
    2,587.20x = 5,001,583.85
  5. Step 5: Solve for x
    x = 5,001,583.85/2,587.20
  6. Step 6: Final answer
    x = 1,933.20

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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.