Home / 2,981.68-4,115.09-1,802.75

Finding the Fourth Proportional to 2,981.68, 4,115.09 and 1,802.75

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Solution

The fourth proportional to 2,981.68, 4,115.09 and 1,802.75 is: 2,488.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.68 : 4,115.09 = 1,802.75 : x
  2. Step 2: Convert to fraction form
    2,981.68/4,115.09 = 1,802.75/x
  3. Step 3: Cross multiply
    2,981.68x = 4,115.09 × 1,802.75
  4. Step 4: Simplify right side
    2,981.68x = 7,418,462.43
  5. Step 5: Solve for x
    x = 7,418,462.43/2,981.68
  6. Step 6: Final answer
    x = 2,488.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.