Home / 2,280.26-3,420.40-720.20

Finding the Fourth Proportional to 2,280.26, 3,420.40 and 720.20

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Solution

The fourth proportional to 2,280.26, 3,420.40 and 720.20 is: 1,080.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.26 : 3,420.40 = 720.20 : x
  2. Step 2: Convert to fraction form
    2,280.26/3,420.40 = 720.20/x
  3. Step 3: Cross multiply
    2,280.26x = 3,420.40 × 720.20
  4. Step 4: Simplify right side
    2,280.26x = 2,463,372.08
  5. Step 5: Solve for x
    x = 2,463,372.08/2,280.26
  6. Step 6: Final answer
    x = 1,080.30

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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.