Home / 1,987.92-2,743.23-1,148.65

Finding the Fourth Proportional to 1,987.92, 2,743.23 and 1,148.65

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Solution

The fourth proportional to 1,987.92, 2,743.23 and 1,148.65 is: 1,585.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.92 : 2,743.23 = 1,148.65 : x
  2. Step 2: Convert to fraction form
    1,987.92/2,743.23 = 1,148.65/x
  3. Step 3: Cross multiply
    1,987.92x = 2,743.23 × 1,148.65
  4. Step 4: Simplify right side
    1,987.92x = 3,151,008.59
  5. Step 5: Solve for x
    x = 3,151,008.59/1,987.92
  6. Step 6: Final answer
    x = 1,585.08

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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.