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Finding the Fourth Proportional to 1,765.20, 2,435.97 and 979.24

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Solution

The fourth proportional to 1,765.20, 2,435.97 and 979.24 is: 1,351.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.20 : 2,435.97 = 979.24 : x
  2. Step 2: Convert to fraction form
    1,765.20/2,435.97 = 979.24/x
  3. Step 3: Cross multiply
    1,765.20x = 2,435.97 × 979.24
  4. Step 4: Simplify right side
    1,765.20x = 2,385,399.26
  5. Step 5: Solve for x
    x = 2,385,399.26/1,765.20
  6. Step 6: Final answer
    x = 1,351.35

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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.