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Finding the Fourth Proportional to 2,221.88, 3,330.68 and 989.46

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Solution

The fourth proportional to 2,221.88, 3,330.68 and 989.46 is: 1,483.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.88 : 3,330.68 = 989.46 : x
  2. Step 2: Convert to fraction form
    2,221.88/3,330.68 = 989.46/x
  3. Step 3: Cross multiply
    2,221.88x = 3,330.68 × 989.46
  4. Step 4: Simplify right side
    2,221.88x = 3,295,574.63
  5. Step 5: Solve for x
    x = 3,295,574.63/2,221.88
  6. Step 6: Final answer
    x = 1,483.24

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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.