Home / 1,815.02-2,724.58-720.15

Finding the Fourth Proportional to 1,815.02, 2,724.58 and 720.15

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Solution

The fourth proportional to 1,815.02, 2,724.58 and 720.15 is: 1,081.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.02 : 2,724.58 = 720.15 : x
  2. Step 2: Convert to fraction form
    1,815.02/2,724.58 = 720.15/x
  3. Step 3: Cross multiply
    1,815.02x = 2,724.58 × 720.15
  4. Step 4: Simplify right side
    1,815.02x = 1,962,115.62
  5. Step 5: Solve for x
    x = 1,962,115.62/1,815.02
  6. Step 6: Final answer
    x = 1,081.04

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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.