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Finding the Fourth Proportional to 351,694.40, 527,930.40 and 218,724.80

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Solution

The fourth proportional to 351,694.40, 527,930.40 and 218,724.80 is: 328,329.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,694.40 : 527,930.40 = 218,724.80 : x
  2. Step 2: Convert to fraction form
    351,694.40/527,930.40 = 218,724.80/x
  3. Step 3: Cross multiply
    351,694.40x = 527,930.40 × 218,724.80
  4. Step 4: Simplify right side
    351,694.40x = 115,471,471,153.92
  5. Step 5: Solve for x
    x = 115,471,471,153.92/351,694.40
  6. Step 6: Final answer
    x = 328,329.00

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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.