Home / 2,220.39-3,330.45-921.87

Finding the Fourth Proportional to 2,220.39, 3,330.45 and 921.87

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Solution

The fourth proportional to 2,220.39, 3,330.45 and 921.87 is: 1,382.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.39 : 3,330.45 = 921.87 : x
  2. Step 2: Convert to fraction form
    2,220.39/3,330.45 = 921.87/x
  3. Step 3: Cross multiply
    2,220.39x = 3,330.45 × 921.87
  4. Step 4: Simplify right side
    2,220.39x = 3,070,241.94
  5. Step 5: Solve for x
    x = 3,070,241.94/2,220.39
  6. Step 6: Final answer
    x = 1,382.75

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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.