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Finding the Fourth Proportional to 2,798.39, 3,864.38 and 1,805.38

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Solution

The fourth proportional to 2,798.39, 3,864.38 and 1,805.38 is: 2,493.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,798.39 : 3,864.38 = 1,805.38 : x
  2. Step 2: Convert to fraction form
    2,798.39/3,864.38 = 1,805.38/x
  3. Step 3: Cross multiply
    2,798.39x = 3,864.38 × 1,805.38
  4. Step 4: Simplify right side
    2,798.39x = 6,976,655.68
  5. Step 5: Solve for x
    x = 6,976,655.68/2,798.39
  6. Step 6: Final answer
    x = 2,493.09

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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.