Home / 1,981.12-2,972.69-1,323.44

Finding the Fourth Proportional to 1,981.12, 2,972.69 and 1,323.44

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Solution

The fourth proportional to 1,981.12, 2,972.69 and 1,323.44 is: 1,985.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.12 : 2,972.69 = 1,323.44 : x
  2. Step 2: Convert to fraction form
    1,981.12/2,972.69 = 1,323.44/x
  3. Step 3: Cross multiply
    1,981.12x = 2,972.69 × 1,323.44
  4. Step 4: Simplify right side
    1,981.12x = 3,934,170.24
  5. Step 5: Solve for x
    x = 3,934,170.24/1,981.12
  6. Step 6: Final answer
    x = 1,985.84

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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.