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Finding the Third Proportional to 1,221.64 and 1,866.64

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Solution

The third proportional to 1,221.64 and 1,866.64 is: 2,852.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.64 : 1,866.64 = 1,866.64 : x
  2. Step 2: Convert to fraction form
    1,221.64/1,866.64 = 1,866.64/x
  3. Step 3: Cross multiply
    1,221.64x = 1,866.64 × 1,866.64
  4. Step 4: Simplify right side
    1,221.64x = 3,484,339.93
  5. Step 5: Solve for x
    x = 3,484,339.93/1,221.64
  6. Step 6: Final answer
    x = 2,852.17

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.