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Finding the Fourth Proportional to 519,479.87, 779,214.80 and 279,705.83

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Solution

The fourth proportional to 519,479.87, 779,214.80 and 279,705.83 is: 419,556.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,479.87 : 779,214.80 = 279,705.83 : x
  2. Step 2: Convert to fraction form
    519,479.87/779,214.80 = 279,705.83/x
  3. Step 3: Cross multiply
    519,479.87x = 779,214.80 × 279,705.83
  4. Step 4: Simplify right side
    519,479.87x = 217,950,919,185.48
  5. Step 5: Solve for x
    x = 217,950,919,185.48/519,479.87
  6. Step 6: Final answer
    x = 419,556.05

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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.