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Finding the Third Proportional to 445,336 and 688,740

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Solution

The third proportional to 445,336 and 688,740 is: 1,065,179.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,336 : 688,740 = 688,740 : x
  2. Step 2: Convert to fraction form
    445,336/688,740 = 688,740/x
  3. Step 3: Cross multiply
    445,336x = 688,740 × 688,740
  4. Step 4: Simplify right side
    445,336x = 474,362,787,600
  5. Step 5: Solve for x
    x = 474,362,787,600/445,336
  6. Step 6: Final answer
    x = 1,065,179.52

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.