Home / 1,765.24-2,435.85-979.12

Finding the Fourth Proportional to 1,765.24, 2,435.85 and 979.12

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Solution

The fourth proportional to 1,765.24, 2,435.85 and 979.12 is: 1,351.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.24 : 2,435.85 = 979.12 : x
  2. Step 2: Convert to fraction form
    1,765.24/2,435.85 = 979.12/x
  3. Step 3: Cross multiply
    1,765.24x = 2,435.85 × 979.12
  4. Step 4: Simplify right side
    1,765.24x = 2,384,989.45
  5. Step 5: Solve for x
    x = 2,384,989.45/1,765.24
  6. Step 6: Final answer
    x = 1,351.09

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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.