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Finding the Fourth Proportional to 528,803.90, 729,864.43 and 324,961.73

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Solution

The fourth proportional to 528,803.90, 729,864.43 and 324,961.73 is: 448,517.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,803.90 : 729,864.43 = 324,961.73 : x
  2. Step 2: Convert to fraction form
    528,803.90/729,864.43 = 324,961.73/x
  3. Step 3: Cross multiply
    528,803.90x = 729,864.43 × 324,961.73
  4. Step 4: Simplify right side
    528,803.90x = 237,178,003,376.54
  5. Step 5: Solve for x
    x = 237,178,003,376.54/528,803.90
  6. Step 6: Final answer
    x = 448,517.88

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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.