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Finding the Fourth Proportional to 2,221.70, 2,956.87 and 2,221.70

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Solution

The fourth proportional to 2,221.70, 2,956.87 and 2,221.70 is: 2,956.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.70 : 2,956.87 = 2,221.70 : x
  2. Step 2: Convert to fraction form
    2,221.70/2,956.87 = 2,221.70/x
  3. Step 3: Cross multiply
    2,221.70x = 2,956.87 × 2,221.70
  4. Step 4: Simplify right side
    2,221.70x = 6,569,266.97
  5. Step 5: Solve for x
    x = 6,569,266.97/2,221.70
  6. Step 6: Final answer
    x = 2,956.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.