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Finding the Fourth Proportional to 878,439, 1,212,245.82 and 476,031

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Solution

The fourth proportional to 878,439, 1,212,245.82 and 476,031 is: 656,922.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,439 : 1,212,245.82 = 476,031 : x
  2. Step 2: Convert to fraction form
    878,439/1,212,245.82 = 476,031/x
  3. Step 3: Cross multiply
    878,439x = 1,212,245.82 × 476,031
  4. Step 4: Simplify right side
    878,439x = 577,066,589,940.42
  5. Step 5: Solve for x
    x = 577,066,589,940.42/878,439
  6. Step 6: Final answer
    x = 656,922.78

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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.