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Finding the Third Proportional to 298,980 and 436,959

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Solution

The third proportional to 298,980 and 436,959 is: 638,615.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,980 : 436,959 = 436,959 : x
  2. Step 2: Convert to fraction form
    298,980/436,959 = 436,959/x
  3. Step 3: Cross multiply
    298,980x = 436,959 × 436,959
  4. Step 4: Simplify right side
    298,980x = 190,933,167,681
  5. Step 5: Solve for x
    x = 190,933,167,681/298,980
  6. Step 6: Final answer
    x = 638,615.18

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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.