Home / 1,987.96-2,744.27-1,431.22

Finding the Fourth Proportional to 1,987.96, 2,744.27 and 1,431.22

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Solution

The fourth proportional to 1,987.96, 2,744.27 and 1,431.22 is: 1,975.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.96 : 2,744.27 = 1,431.22 : x
  2. Step 2: Convert to fraction form
    1,987.96/2,744.27 = 1,431.22/x
  3. Step 3: Cross multiply
    1,987.96x = 2,744.27 × 1,431.22
  4. Step 4: Simplify right side
    1,987.96x = 3,927,654.11
  5. Step 5: Solve for x
    x = 3,927,654.11/1,987.96
  6. Step 6: Final answer
    x = 1,975.72

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1.5x scale

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.