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Finding the Third Proportional to 405,740 and 867,764

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Solution

The third proportional to 405,740 and 867,764 is: 1,855,903.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,740 : 867,764 = 867,764 : x
  2. Step 2: Convert to fraction form
    405,740/867,764 = 867,764/x
  3. Step 3: Cross multiply
    405,740x = 867,764 × 867,764
  4. Step 4: Simplify right side
    405,740x = 753,014,359,696
  5. Step 5: Solve for x
    x = 753,014,359,696/405,740
  6. Step 6: Final answer
    x = 1,855,903.68

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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.