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Finding the Fourth Proportional to 408,843.95, 563,721.80 and 279,844.70

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Solution

The fourth proportional to 408,843.95, 563,721.80 and 279,844.70 is: 385,855.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,843.95 : 563,721.80 = 279,844.70 : x
  2. Step 2: Convert to fraction form
    408,843.95/563,721.80 = 279,844.70/x
  3. Step 3: Cross multiply
    408,843.95x = 563,721.80 × 279,844.70
  4. Step 4: Simplify right side
    408,843.95x = 157,754,553,786.63
  5. Step 5: Solve for x
    x = 157,754,553,786.63/408,843.95
  6. Step 6: Final answer
    x = 385,855.18

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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.