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Finding the Third Proportional to 438,417 and 660,522

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Solution

The third proportional to 438,417 and 660,522 is: 995,146.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,417 : 660,522 = 660,522 : x
  2. Step 2: Convert to fraction form
    438,417/660,522 = 660,522/x
  3. Step 3: Cross multiply
    438,417x = 660,522 × 660,522
  4. Step 4: Simplify right side
    438,417x = 436,289,312,484
  5. Step 5: Solve for x
    x = 436,289,312,484/438,417
  6. Step 6: Final answer
    x = 995,146.89

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.