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Finding the Fourth Proportional to 489,418.96, 675,687.72 and 308,286.16

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Solution

The fourth proportional to 489,418.96, 675,687.72 and 308,286.16 is: 425,617.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,418.96 : 675,687.72 = 308,286.16 : x
  2. Step 2: Convert to fraction form
    489,418.96/675,687.72 = 308,286.16/x
  3. Step 3: Cross multiply
    489,418.96x = 675,687.72 × 308,286.16
  4. Step 4: Simplify right side
    489,418.96x = 208,305,172,557.96
  5. Step 5: Solve for x
    x = 208,305,172,557.96/489,418.96
  6. Step 6: Final answer
    x = 425,617.29

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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.