Home / 3,319.62-4,980.29-979.53

Finding the Fourth Proportional to 3,319.62, 4,980.29 and 979.53

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Solution

The fourth proportional to 3,319.62, 4,980.29 and 979.53 is: 1,469.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,319.62 : 4,980.29 = 979.53 : x
  2. Step 2: Convert to fraction form
    3,319.62/4,980.29 = 979.53/x
  3. Step 3: Cross multiply
    3,319.62x = 4,980.29 × 979.53
  4. Step 4: Simplify right side
    3,319.62x = 4,878,355.91
  5. Step 5: Solve for x
    x = 4,878,355.91/3,319.62
  6. Step 6: Final answer
    x = 1,469.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.