Home / 1,981.24-2,969.68-1,251.16

Finding the Fourth Proportional to 1,981.24, 2,969.68 and 1,251.16

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Solution

The fourth proportional to 1,981.24, 2,969.68 and 1,251.16 is: 1,875.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.24 : 2,969.68 = 1,251.16 : x
  2. Step 2: Convert to fraction form
    1,981.24/2,969.68 = 1,251.16/x
  3. Step 3: Cross multiply
    1,981.24x = 2,969.68 × 1,251.16
  4. Step 4: Simplify right side
    1,981.24x = 3,715,544.83
  5. Step 5: Solve for x
    x = 3,715,544.83/1,981.24
  6. Step 6: Final answer
    x = 1,875.36

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1.5x scale

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.