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Finding the Third Proportional to 291,055 and 434,787

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Solution

The third proportional to 291,055 and 434,787 is: 649,498.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,055 : 434,787 = 434,787 : x
  2. Step 2: Convert to fraction form
    291,055/434,787 = 434,787/x
  3. Step 3: Cross multiply
    291,055x = 434,787 × 434,787
  4. Step 4: Simplify right side
    291,055x = 189,039,735,369
  5. Step 5: Solve for x
    x = 189,039,735,369/291,055
  6. Step 6: Final answer
    x = 649,498.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.