Home / 1,981.62-2,975.14-1,276.92

Finding the Fourth Proportional to 1,981.62, 2,975.14 and 1,276.92

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Solution

The fourth proportional to 1,981.62, 2,975.14 and 1,276.92 is: 1,917.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.62 : 2,975.14 = 1,276.92 : x
  2. Step 2: Convert to fraction form
    1,981.62/2,975.14 = 1,276.92/x
  3. Step 3: Cross multiply
    1,981.62x = 2,975.14 × 1,276.92
  4. Step 4: Simplify right side
    1,981.62x = 3,799,015.77
  5. Step 5: Solve for x
    x = 3,799,015.77/1,981.62
  6. Step 6: Final answer
    x = 1,917.13

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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.