Home / 408,815.35-563,682.40-279,816.10

Finding the Fourth Proportional to 408,815.35, 563,682.40 and 279,816.10

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Solution

The fourth proportional to 408,815.35, 563,682.40 and 279,816.10 is: 385,815.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,815.35 : 563,682.40 = 279,816.10 : x
  2. Step 2: Convert to fraction form
    408,815.35/563,682.40 = 279,816.10/x
  3. Step 3: Cross multiply
    408,815.35x = 563,682.40 × 279,816.10
  4. Step 4: Simplify right side
    408,815.35x = 157,727,412,385.67
  5. Step 5: Solve for x
    x = 157,727,412,385.67/408,815.35
  6. Step 6: Final answer
    x = 385,815.78

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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.