Home / 1,765.07-2,435.78-979.11

Finding the Fourth Proportional to 1,765.07, 2,435.78 and 979.11

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Solution

The fourth proportional to 1,765.07, 2,435.78 and 979.11 is: 1,351.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.07 : 2,435.78 = 979.11 : x
  2. Step 2: Convert to fraction form
    1,765.07/2,435.78 = 979.11/x
  3. Step 3: Cross multiply
    1,765.07x = 2,435.78 × 979.11
  4. Step 4: Simplify right side
    1,765.07x = 2,384,891.66
  5. Step 5: Solve for x
    x = 2,384,891.66/1,765.07
  6. Step 6: Final answer
    x = 1,351.16

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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.