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Finding the Third Proportional to 623,876 and 991,808

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Solution

The third proportional to 623,876 and 991,808 is: 1,576,728.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,876 : 991,808 = 991,808 : x
  2. Step 2: Convert to fraction form
    623,876/991,808 = 991,808/x
  3. Step 3: Cross multiply
    623,876x = 991,808 × 991,808
  4. Step 4: Simplify right side
    623,876x = 983,683,108,864
  5. Step 5: Solve for x
    x = 983,683,108,864/623,876
  6. Step 6: Final answer
    x = 1,576,728.56

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.