Home / 1,987.63-2,742.29-1,148.22

Finding the Fourth Proportional to 1,987.63, 2,742.29 and 1,148.22

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Solution

The fourth proportional to 1,987.63, 2,742.29 and 1,148.22 is: 1,584.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.63 : 2,742.29 = 1,148.22 : x
  2. Step 2: Convert to fraction form
    1,987.63/2,742.29 = 1,148.22/x
  3. Step 3: Cross multiply
    1,987.63x = 2,742.29 × 1,148.22
  4. Step 4: Simplify right side
    1,987.63x = 3,148,752.22
  5. Step 5: Solve for x
    x = 3,148,752.22/1,987.63
  6. Step 6: Final answer
    x = 1,584.18

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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.