Home / 2,187.28-3,280.98-543.84

Finding the Fourth Proportional to 2,187.28, 3,280.98 and 543.84

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Solution

The fourth proportional to 2,187.28, 3,280.98 and 543.84 is: 815.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.28 : 3,280.98 = 543.84 : x
  2. Step 2: Convert to fraction form
    2,187.28/3,280.98 = 543.84/x
  3. Step 3: Cross multiply
    2,187.28x = 3,280.98 × 543.84
  4. Step 4: Simplify right side
    2,187.28x = 1,784,325.60
  5. Step 5: Solve for x
    x = 1,784,325.60/2,187.28
  6. Step 6: Final answer
    x = 815.77

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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.