Home / 2,220.32-3,328.94-987.08

Finding the Fourth Proportional to 2,220.32, 3,328.94 and 987.08

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Solution

The fourth proportional to 2,220.32, 3,328.94 and 987.08 is: 1,479.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.32 : 3,328.94 = 987.08 : x
  2. Step 2: Convert to fraction form
    2,220.32/3,328.94 = 987.08/x
  3. Step 3: Cross multiply
    2,220.32x = 3,328.94 × 987.08
  4. Step 4: Simplify right side
    2,220.32x = 3,285,930.10
  5. Step 5: Solve for x
    x = 3,285,930.10/2,220.32
  6. Step 6: Final answer
    x = 1,479.94

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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.