Home / 2,280.19-3,420.12-720.25

Finding the Fourth Proportional to 2,280.19, 3,420.12 and 720.25

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Solution

The fourth proportional to 2,280.19, 3,420.12 and 720.25 is: 1,080.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.19 : 3,420.12 = 720.25 : x
  2. Step 2: Convert to fraction form
    2,280.19/3,420.12 = 720.25/x
  3. Step 3: Cross multiply
    2,280.19x = 3,420.12 × 720.25
  4. Step 4: Simplify right side
    2,280.19x = 2,463,341.43
  5. Step 5: Solve for x
    x = 2,463,341.43/2,280.19
  6. Step 6: Final answer
    x = 1,080.32

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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.