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Finding the Fourth Proportional to 667,805.40, 921,569.67 and 361,890.27

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Solution

The fourth proportional to 667,805.40, 921,569.67 and 361,890.27 is: 499,407.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,805.40 : 921,569.67 = 361,890.27 : x
  2. Step 2: Convert to fraction form
    667,805.40/921,569.67 = 361,890.27/x
  3. Step 3: Cross multiply
    667,805.40x = 921,569.67 × 361,890.27
  4. Step 4: Simplify right side
    667,805.40x = 333,507,096,700.11
  5. Step 5: Solve for x
    x = 333,507,096,700.11/667,805.40
  6. Step 6: Final answer
    x = 499,407.61

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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.