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Finding the Third Proportional to 317,721 and 698,410.50

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Solution

The third proportional to 317,721 and 698,410.50 is: 1,535,237.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,721 : 698,410.50 = 698,410.50 : x
  2. Step 2: Convert to fraction form
    317,721/698,410.50 = 698,410.50/x
  3. Step 3: Cross multiply
    317,721x = 698,410.50 × 698,410.50
  4. Step 4: Simplify right side
    317,721x = 487,777,226,510.25
  5. Step 5: Solve for x
    x = 487,777,226,510.25/317,721
  6. Step 6: Final answer
    x = 1,535,237.60

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.