Home / 2,220.45-3,330.95-921.75

Finding the Fourth Proportional to 2,220.45, 3,330.95 and 921.75

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Solution

The fourth proportional to 2,220.45, 3,330.95 and 921.75 is: 1,382.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,220.45 : 3,330.95 = 921.75 : x
  2. Step 2: Convert to fraction form
    2,220.45/3,330.95 = 921.75/x
  3. Step 3: Cross multiply
    2,220.45x = 3,330.95 × 921.75
  4. Step 4: Simplify right side
    2,220.45x = 3,070,298.55
  5. Step 5: Solve for x
    x = 3,070,298.55/2,220.45
  6. Step 6: Final answer
    x = 1,382.74

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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.