Home / 1,987.89-2,743.45-1,148.63

Finding the Fourth Proportional to 1,987.89, 2,743.45 and 1,148.63

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Solution

The fourth proportional to 1,987.89, 2,743.45 and 1,148.63 is: 1,585.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.89 : 2,743.45 = 1,148.63 : x
  2. Step 2: Convert to fraction form
    1,987.89/2,743.45 = 1,148.63/x
  3. Step 3: Cross multiply
    1,987.89x = 2,743.45 × 1,148.63
  4. Step 4: Simplify right side
    1,987.89x = 3,151,195.26
  5. Step 5: Solve for x
    x = 3,151,195.26/1,987.89
  6. Step 6: Final answer
    x = 1,585.20

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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.