Home / 1,815.91-2,724.12-720.39

Finding the Fourth Proportional to 1,815.91, 2,724.12 and 720.39

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Solution

The fourth proportional to 1,815.91, 2,724.12 and 720.39 is: 1,080.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.91 : 2,724.12 = 720.39 : x
  2. Step 2: Convert to fraction form
    1,815.91/2,724.12 = 720.39/x
  3. Step 3: Cross multiply
    1,815.91x = 2,724.12 × 720.39
  4. Step 4: Simplify right side
    1,815.91x = 1,962,428.81
  5. Step 5: Solve for x
    x = 1,962,428.81/1,815.91
  6. Step 6: Final answer
    x = 1,080.69

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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.