Home / 1,981.09-2,967.97-1,431.91

Finding the Fourth Proportional to 1,981.09, 2,967.97 and 1,431.91

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Solution

The fourth proportional to 1,981.09, 2,967.97 and 1,431.91 is: 2,145.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.09 : 2,967.97 = 1,431.91 : x
  2. Step 2: Convert to fraction form
    1,981.09/2,967.97 = 1,431.91/x
  3. Step 3: Cross multiply
    1,981.09x = 2,967.97 × 1,431.91
  4. Step 4: Simplify right side
    1,981.09x = 4,249,865.92
  5. Step 5: Solve for x
    x = 4,249,865.92/1,981.09
  6. Step 6: Final answer
    x = 2,145.22

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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.