Home / 2,220.61-3,331.28-681.25

Finding the Fourth Proportional to 2,220.61, 3,331.28 and 681.25

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Solution

The fourth proportional to 2,220.61, 3,331.28 and 681.25 is: 1,021.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.61 : 3,331.28 = 681.25 : x
  2. Step 2: Convert to fraction form
    2,220.61/3,331.28 = 681.25/x
  3. Step 3: Cross multiply
    2,220.61x = 3,331.28 × 681.25
  4. Step 4: Simplify right side
    2,220.61x = 2,269,434.50
  5. Step 5: Solve for x
    x = 2,269,434.50/2,220.61
  6. Step 6: Final answer
    x = 1,021.99

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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.