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Finding the Third Proportional to 687,064 and 903,487

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Solution

The third proportional to 687,064 and 903,487 is: 1,188,082.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,064 : 903,487 = 903,487 : x
  2. Step 2: Convert to fraction form
    687,064/903,487 = 903,487/x
  3. Step 3: Cross multiply
    687,064x = 903,487 × 903,487
  4. Step 4: Simplify right side
    687,064x = 816,288,759,169
  5. Step 5: Solve for x
    x = 816,288,759,169/687,064
  6. Step 6: Final answer
    x = 1,188,082.56

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.