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Finding the Fourth Proportional to 667,863.90, 921,650.13 and 361,949.04

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Solution

The fourth proportional to 667,863.90, 921,650.13 and 361,949.04 is: 499,488.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,863.90 : 921,650.13 = 361,949.04 : x
  2. Step 2: Convert to fraction form
    667,863.90/921,650.13 = 361,949.04/x
  3. Step 3: Cross multiply
    667,863.90x = 921,650.13 × 361,949.04
  4. Step 4: Simplify right side
    667,863.90x = 333,590,379,769.38
  5. Step 5: Solve for x
    x = 333,590,379,769.38/667,863.90
  6. Step 6: Final answer
    x = 499,488.56

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1.5x scale

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.