Home / 2,982.08-4,113.78-1,987.40

Finding the Fourth Proportional to 2,982.08, 4,113.78 and 1,987.40

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Solution

The fourth proportional to 2,982.08, 4,113.78 and 1,987.40 is: 2,741.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,982.08 : 4,113.78 = 1,987.40 : x
  2. Step 2: Convert to fraction form
    2,982.08/4,113.78 = 1,987.40/x
  3. Step 3: Cross multiply
    2,982.08x = 4,113.78 × 1,987.40
  4. Step 4: Simplify right side
    2,982.08x = 8,175,726.37
  5. Step 5: Solve for x
    x = 8,175,726.37/2,982.08
  6. Step 6: Final answer
    x = 2,741.62

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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.