Home / 1,981.28-2,971.96-1,249.31

Finding the Fourth Proportional to 1,981.28, 2,971.96 and 1,249.31

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Solution

The fourth proportional to 1,981.28, 2,971.96 and 1,249.31 is: 1,873.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.28 : 2,971.96 = 1,249.31 : x
  2. Step 2: Convert to fraction form
    1,981.28/2,971.96 = 1,249.31/x
  3. Step 3: Cross multiply
    1,981.28x = 2,971.96 × 1,249.31
  4. Step 4: Simplify right side
    1,981.28x = 3,712,903.65
  5. Step 5: Solve for x
    x = 3,712,903.65/1,981.28
  6. Step 6: Final answer
    x = 1,873.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.