Home / 2,187.72-3,280.14-727.20

Finding the Fourth Proportional to 2,187.72, 3,280.14 and 727.20

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Solution

The fourth proportional to 2,187.72, 3,280.14 and 727.20 is: 1,090.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.72 : 3,280.14 = 727.20 : x
  2. Step 2: Convert to fraction form
    2,187.72/3,280.14 = 727.20/x
  3. Step 3: Cross multiply
    2,187.72x = 3,280.14 × 727.20
  4. Step 4: Simplify right side
    2,187.72x = 2,385,317.81
  5. Step 5: Solve for x
    x = 2,385,317.81/2,187.72
  6. Step 6: Final answer
    x = 1,090.32

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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.