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Finding the Third Proportional to 388,617 and 840,435

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Solution

The third proportional to 388,617 and 840,435 is: 1,817,550.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,617 : 840,435 = 840,435 : x
  2. Step 2: Convert to fraction form
    388,617/840,435 = 840,435/x
  3. Step 3: Cross multiply
    388,617x = 840,435 × 840,435
  4. Step 4: Simplify right side
    388,617x = 706,330,989,225
  5. Step 5: Solve for x
    x = 706,330,989,225/388,617
  6. Step 6: Final answer
    x = 1,817,550.41

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.