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Finding the Fourth Proportional to 2,219.55, 3,329.50 and 638.27

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Solution

The fourth proportional to 2,219.55, 3,329.50 and 638.27 is: 957.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.55 : 3,329.50 = 638.27 : x
  2. Step 2: Convert to fraction form
    2,219.55/3,329.50 = 638.27/x
  3. Step 3: Cross multiply
    2,219.55x = 3,329.50 × 638.27
  4. Step 4: Simplify right side
    2,219.55x = 2,125,119.97
  5. Step 5: Solve for x
    x = 2,125,119.97/2,219.55
  6. Step 6: Final answer
    x = 957.46

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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.