Home / 1,817.20-2,724.70-720.30

Finding the Fourth Proportional to 1,817.20, 2,724.70 and 720.30

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Solution

The fourth proportional to 1,817.20, 2,724.70 and 720.30 is: 1,080.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,817.20 : 2,724.70 = 720.30 : x
  2. Step 2: Convert to fraction form
    1,817.20/2,724.70 = 720.30/x
  3. Step 3: Cross multiply
    1,817.20x = 2,724.70 × 720.30
  4. Step 4: Simplify right side
    1,817.20x = 1,962,601.41
  5. Step 5: Solve for x
    x = 1,962,601.41/1,817.20
  6. Step 6: Final answer
    x = 1,080.01

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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.