Home / 3,320.70-4,980.88-1,129.47

Finding the Fourth Proportional to 3,320.70, 4,980.88 and 1,129.47

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Solution

The fourth proportional to 3,320.70, 4,980.88 and 1,129.47 is: 1,694.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320.70 : 4,980.88 = 1,129.47 : x
  2. Step 2: Convert to fraction form
    3,320.70/4,980.88 = 1,129.47/x
  3. Step 3: Cross multiply
    3,320.70x = 4,980.88 × 1,129.47
  4. Step 4: Simplify right side
    3,320.70x = 5,625,754.53
  5. Step 5: Solve for x
    x = 5,625,754.53/3,320.70
  6. Step 6: Final answer
    x = 1,694.15

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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.