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Finding the Third Proportional to 189,744.75 and 406,390.50

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Solution

The third proportional to 189,744.75 and 406,390.50 is: 870,396.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,744.75 : 406,390.50 = 406,390.50 : x
  2. Step 2: Convert to fraction form
    189,744.75/406,390.50 = 406,390.50/x
  3. Step 3: Cross multiply
    189,744.75x = 406,390.50 × 406,390.50
  4. Step 4: Simplify right side
    189,744.75x = 165,153,238,490.25
  5. Step 5: Solve for x
    x = 165,153,238,490.25/189,744.75
  6. Step 6: Final answer
    x = 870,396.88

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.