Home / 2,187.21-3,280.89-726.32

Finding the Fourth Proportional to 2,187.21, 3,280.89 and 726.32

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Solution

The fourth proportional to 2,187.21, 3,280.89 and 726.32 is: 1,089.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.21 : 3,280.89 = 726.32 : x
  2. Step 2: Convert to fraction form
    2,187.21/3,280.89 = 726.32/x
  3. Step 3: Cross multiply
    2,187.21x = 3,280.89 × 726.32
  4. Step 4: Simplify right side
    2,187.21x = 2,382,976.02
  5. Step 5: Solve for x
    x = 2,382,976.02/2,187.21
  6. Step 6: Final answer
    x = 1,089.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 2,188.21, 3,282.39 and 727.32
Similar ratio
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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.