Home / 1,765.85-2,436.93-979.88

Finding the Fourth Proportional to 1,765.85, 2,436.93 and 979.88

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Solution

The fourth proportional to 1,765.85, 2,436.93 and 979.88 is: 1,352.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.85 : 2,436.93 = 979.88 : x
  2. Step 2: Convert to fraction form
    1,765.85/2,436.93 = 979.88/x
  3. Step 3: Cross multiply
    1,765.85x = 2,436.93 × 979.88
  4. Step 4: Simplify right side
    1,765.85x = 2,387,886.78
  5. Step 5: Solve for x
    x = 2,387,886.78/1,765.85
  6. Step 6: Final answer
    x = 1,352.26

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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.