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Finding the Fourth Proportional to 489,048.72, 674,654.82 and 325,781.11

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Solution

The fourth proportional to 489,048.72, 674,654.82 and 325,781.11 is: 449,423.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,048.72 : 674,654.82 = 325,781.11 : x
  2. Step 2: Convert to fraction form
    489,048.72/674,654.82 = 325,781.11/x
  3. Step 3: Cross multiply
    489,048.72x = 674,654.82 × 325,781.11
  4. Step 4: Simplify right side
    489,048.72x = 219,789,796,126.45
  5. Step 5: Solve for x
    x = 219,789,796,126.45/489,048.72
  6. Step 6: Final answer
    x = 449,423.11

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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.