Home / 1,981.84-2,972.40-1,249.24

Finding the Fourth Proportional to 1,981.84, 2,972.40 and 1,249.24

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Solution

The fourth proportional to 1,981.84, 2,972.40 and 1,249.24 is: 1,873.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.84 : 2,972.40 = 1,249.24 : x
  2. Step 2: Convert to fraction form
    1,981.84/2,972.40 = 1,249.24/x
  3. Step 3: Cross multiply
    1,981.84x = 2,972.40 × 1,249.24
  4. Step 4: Simplify right side
    1,981.84x = 3,713,240.98
  5. Step 5: Solve for x
    x = 3,713,240.98/1,981.84
  6. Step 6: Final answer
    x = 1,873.63

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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.