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Finding the Third Proportional to 189,276 and 290,928

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Solution

The third proportional to 189,276 and 290,928 is: 447,172.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,276 : 290,928 = 290,928 : x
  2. Step 2: Convert to fraction form
    189,276/290,928 = 290,928/x
  3. Step 3: Cross multiply
    189,276x = 290,928 × 290,928
  4. Step 4: Simplify right side
    189,276x = 84,639,101,184
  5. Step 5: Solve for x
    x = 84,639,101,184/189,276
  6. Step 6: Final answer
    x = 447,172.92

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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.