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Finding the Fourth Proportional to 394,428.80, 591,205.80 and 217,063.10

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Solution

The fourth proportional to 394,428.80, 591,205.80 and 217,063.10 is: 325,353.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,428.80 : 591,205.80 = 217,063.10 : x
  2. Step 2: Convert to fraction form
    394,428.80/591,205.80 = 217,063.10/x
  3. Step 3: Cross multiply
    394,428.80x = 591,205.80 × 217,063.10
  4. Step 4: Simplify right side
    394,428.80x = 128,328,963,685.98
  5. Step 5: Solve for x
    x = 128,328,963,685.98/394,428.80
  6. Step 6: Final answer
    x = 325,353.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.