Home / 3,319.80-4,980.56-1,239.82

Finding the Fourth Proportional to 3,319.80, 4,980.56 and 1,239.82

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Solution

The fourth proportional to 3,319.80, 4,980.56 and 1,239.82 is: 1,860.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,319.80 : 4,980.56 = 1,239.82 : x
  2. Step 2: Convert to fraction form
    3,319.80/4,980.56 = 1,239.82/x
  3. Step 3: Cross multiply
    3,319.80x = 4,980.56 × 1,239.82
  4. Step 4: Simplify right side
    3,319.80x = 6,175,015.98
  5. Step 5: Solve for x
    x = 6,175,015.98/3,319.80
  6. Step 6: Final answer
    x = 1,860.05

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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.