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Finding the Fourth Proportional to 576,828.30, 796,039.11 and 318,721.88

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Solution

The fourth proportional to 576,828.30, 796,039.11 and 318,721.88 is: 439,845.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,828.30 : 796,039.11 = 318,721.88 : x
  2. Step 2: Convert to fraction form
    576,828.30/796,039.11 = 318,721.88/x
  3. Step 3: Cross multiply
    576,828.30x = 796,039.11 × 318,721.88
  4. Step 4: Simplify right side
    576,828.30x = 253,715,081,692.73
  5. Step 5: Solve for x
    x = 253,715,081,692.73/576,828.30
  6. Step 6: Final answer
    x = 439,845.07

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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.