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Finding the Fourth Proportional to 667,667.88, 921,371.76 and 361,735.74

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Solution

The fourth proportional to 667,667.88, 921,371.76 and 361,735.74 is: 499,189.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,667.88 : 921,371.76 = 361,735.74 : x
  2. Step 2: Convert to fraction form
    667,667.88/921,371.76 = 361,735.74/x
  3. Step 3: Cross multiply
    667,667.88x = 921,371.76 × 361,735.74
  4. Step 4: Simplify right side
    667,667.88x = 333,293,095,418.70
  5. Step 5: Solve for x
    x = 333,293,095,418.70/667,667.88
  6. Step 6: Final answer
    x = 499,189.95

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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.