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Finding the Third Proportional to 1,421.72 and 2,193.47

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Solution

The third proportional to 1,421.72 and 2,193.47 is: 3,384.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.72 : 2,193.47 = 2,193.47 : x
  2. Step 2: Convert to fraction form
    1,421.72/2,193.47 = 2,193.47/x
  3. Step 3: Cross multiply
    1,421.72x = 2,193.47 × 2,193.47
  4. Step 4: Simplify right side
    1,421.72x = 4,811,305.16
  5. Step 5: Solve for x
    x = 4,811,305.16/1,421.72
  6. Step 6: Final answer
    x = 3,384.15

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.