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Finding the Fourth Proportional to 667,717.83, 921,449.12 and 361,802.57

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Solution

The fourth proportional to 667,717.83, 921,449.12 and 361,802.57 is: 499,286.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,717.83 : 921,449.12 = 361,802.57 : x
  2. Step 2: Convert to fraction form
    667,717.83/921,449.12 = 361,802.57/x
  3. Step 3: Cross multiply
    667,717.83x = 921,449.12 × 361,802.57
  4. Step 4: Simplify right side
    667,717.83x = 333,382,653,323.98
  5. Step 5: Solve for x
    x = 333,382,653,323.98/667,717.83
  6. Step 6: Final answer
    x = 499,286.73

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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.