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Finding the Third Proportional to 143,400 and 221,928

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Solution

The third proportional to 143,400 and 221,928 is: 343,459.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,400 : 221,928 = 221,928 : x
  2. Step 2: Convert to fraction form
    143,400/221,928 = 221,928/x
  3. Step 3: Cross multiply
    143,400x = 221,928 × 221,928
  4. Step 4: Simplify right side
    143,400x = 49,252,037,184
  5. Step 5: Solve for x
    x = 49,252,037,184/143,400
  6. Step 6: Final answer
    x = 343,459.12

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.