Home / 2,987.48-4,481.06-1,428.59

Finding the Fourth Proportional to 2,987.48, 4,481.06 and 1,428.59

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Solution

The fourth proportional to 2,987.48, 4,481.06 and 1,428.59 is: 2,142.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.48 : 4,481.06 = 1,428.59 : x
  2. Step 2: Convert to fraction form
    2,987.48/4,481.06 = 1,428.59/x
  3. Step 3: Cross multiply
    2,987.48x = 4,481.06 × 1,428.59
  4. Step 4: Simplify right side
    2,987.48x = 6,401,601.57
  5. Step 5: Solve for x
    x = 6,401,601.57/2,987.48
  6. Step 6: Final answer
    x = 2,142.81

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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.