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Finding the Fourth Proportional to 2,019.40, 3,029.40 and 720.56

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Solution

The fourth proportional to 2,019.40, 3,029.40 and 720.56 is: 1,080.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,019.40 : 3,029.40 = 720.56 : x
  2. Step 2: Convert to fraction form
    2,019.40/3,029.40 = 720.56/x
  3. Step 3: Cross multiply
    2,019.40x = 3,029.40 × 720.56
  4. Step 4: Simplify right side
    2,019.40x = 2,182,872.04
  5. Step 5: Solve for x
    x = 2,182,872.04/2,019.40
  6. Step 6: Final answer
    x = 1,080.95

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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.