Home / 2,988.05-4,122.83-1,809.09

Finding the Fourth Proportional to 2,988.05, 4,122.83 and 1,809.09

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Solution

The fourth proportional to 2,988.05, 4,122.83 and 1,809.09 is: 2,496.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.05 : 4,122.83 = 1,809.09 : x
  2. Step 2: Convert to fraction form
    2,988.05/4,122.83 = 1,809.09/x
  3. Step 3: Cross multiply
    2,988.05x = 4,122.83 × 1,809.09
  4. Step 4: Simplify right side
    2,988.05x = 7,458,575.05
  5. Step 5: Solve for x
    x = 7,458,575.05/2,988.05
  6. Step 6: Final answer
    x = 2,496.14

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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.