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Finding the Third Proportional to 638,580 and 929,790

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Solution

The third proportional to 638,580 and 929,790 is: 1,353,799.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,580 : 929,790 = 929,790 : x
  2. Step 2: Convert to fraction form
    638,580/929,790 = 929,790/x
  3. Step 3: Cross multiply
    638,580x = 929,790 × 929,790
  4. Step 4: Simplify right side
    638,580x = 864,509,444,100
  5. Step 5: Solve for x
    x = 864,509,444,100/638,580
  6. Step 6: Final answer
    x = 1,353,799.75

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.