Home / 1,816.20-2,724.06-720.84

Finding the Fourth Proportional to 1,816.20, 2,724.06 and 720.84

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Solution

The fourth proportional to 1,816.20, 2,724.06 and 720.84 is: 1,081.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,816.20 : 2,724.06 = 720.84 : x
  2. Step 2: Convert to fraction form
    1,816.20/2,724.06 = 720.84/x
  3. Step 3: Cross multiply
    1,816.20x = 2,724.06 × 720.84
  4. Step 4: Simplify right side
    1,816.20x = 1,963,611.41
  5. Step 5: Solve for x
    x = 1,963,611.41/1,816.20
  6. Step 6: Final answer
    x = 1,081.16

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1.5x scale

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.