Home / 1,987.11-2,742.28-1,201

Finding the Fourth Proportional to 1,987.11, 2,742.28 and 1,201

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Solution

The fourth proportional to 1,987.11, 2,742.28 and 1,201 is: 1,657.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.11 : 2,742.28 = 1,201 : x
  2. Step 2: Convert to fraction form
    1,987.11/2,742.28 = 1,201/x
  3. Step 3: Cross multiply
    1,987.11x = 2,742.28 × 1,201
  4. Step 4: Simplify right side
    1,987.11x = 3,293,478.28
  5. Step 5: Solve for x
    x = 3,293,478.28/1,987.11
  6. Step 6: Final answer
    x = 1,657.42

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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.