Home / 2,775.97-3,825.56-1,988.65

Finding the Fourth Proportional to 2,775.97, 3,825.56 and 1,988.65

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Solution

The fourth proportional to 2,775.97, 3,825.56 and 1,988.65 is: 2,740.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,775.97 : 3,825.56 = 1,988.65 : x
  2. Step 2: Convert to fraction form
    2,775.97/3,825.56 = 1,988.65/x
  3. Step 3: Cross multiply
    2,775.97x = 3,825.56 × 1,988.65
  4. Step 4: Simplify right side
    2,775.97x = 7,607,695.30
  5. Step 5: Solve for x
    x = 7,607,695.30/2,775.97
  6. Step 6: Final answer
    x = 2,740.56

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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.