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Finding the Fourth Proportional to 1,481.07, 2,219.00 and 987.22

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Solution

The fourth proportional to 1,481.07, 2,219.00 and 987.22 is: 1,479.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,481.07 : 2,219.00 = 987.22 : x
  2. Step 2: Convert to fraction form
    1,481.07/2,219.00 = 987.22/x
  3. Step 3: Cross multiply
    1,481.07x = 2,219.00 × 987.22
  4. Step 4: Simplify right side
    1,481.07x = 2,190,630.70
  5. Step 5: Solve for x
    x = 2,190,630.70/1,481.07
  6. Step 6: Final answer
    x = 1,479.09

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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.