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Finding the Fourth Proportional to 489,216.11, 674,493.28 and 316,829.48

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Solution

The fourth proportional to 489,216.11, 674,493.28 and 316,829.48 is: 436,819.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,216.11 : 674,493.28 = 316,829.48 : x
  2. Step 2: Convert to fraction form
    489,216.11/674,493.28 = 316,829.48/x
  3. Step 3: Cross multiply
    489,216.11x = 674,493.28 × 316,829.48
  4. Step 4: Simplify right side
    489,216.11x = 213,699,351,001.35
  5. Step 5: Solve for x
    x = 213,699,351,001.35/489,216.11
  6. Step 6: Final answer
    x = 436,819.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.