Home / 2,280.18-3,420.73-720.43

Finding the Fourth Proportional to 2,280.18, 3,420.73 and 720.43

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Solution

The fourth proportional to 2,280.18, 3,420.73 and 720.43 is: 1,080.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.18 : 3,420.73 = 720.43 : x
  2. Step 2: Convert to fraction form
    2,280.18/3,420.73 = 720.43/x
  3. Step 3: Cross multiply
    2,280.18x = 3,420.73 × 720.43
  4. Step 4: Simplify right side
    2,280.18x = 2,464,379.41
  5. Step 5: Solve for x
    x = 2,464,379.41/2,280.18
  6. Step 6: Final answer
    x = 1,080.78

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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.