Home / 2,220.22-3,331.10-987.74

Finding the Fourth Proportional to 2,220.22, 3,331.10 and 987.74

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Solution

The fourth proportional to 2,220.22, 3,331.10 and 987.74 is: 1,481.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.22 : 3,331.10 = 987.74 : x
  2. Step 2: Convert to fraction form
    2,220.22/3,331.10 = 987.74/x
  3. Step 3: Cross multiply
    2,220.22x = 3,331.10 × 987.74
  4. Step 4: Simplify right side
    2,220.22x = 3,290,260.71
  5. Step 5: Solve for x
    x = 3,290,260.71/2,220.22
  6. Step 6: Final answer
    x = 1,481.95

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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.