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Finding the Third Proportional to 387,624 and 831,284

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Solution

The third proportional to 387,624 and 831,284 is: 1,782,740.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,624 : 831,284 = 831,284 : x
  2. Step 2: Convert to fraction form
    387,624/831,284 = 831,284/x
  3. Step 3: Cross multiply
    387,624x = 831,284 × 831,284
  4. Step 4: Simplify right side
    387,624x = 691,033,088,656
  5. Step 5: Solve for x
    x = 691,033,088,656/387,624
  6. Step 6: Final answer
    x = 1,782,740.72

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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.