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Finding the Fourth Proportional to 667,648.47, 921,355.00 and 361,726.97

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Solution

The fourth proportional to 667,648.47, 921,355.00 and 361,726.97 is: 499,183.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,648.47 : 921,355.00 = 361,726.97 : x
  2. Step 2: Convert to fraction form
    667,648.47/921,355.00 = 361,726.97/x
  3. Step 3: Cross multiply
    667,648.47x = 921,355.00 × 361,726.97
  4. Step 4: Simplify right side
    667,648.47x = 333,278,948,967.97
  5. Step 5: Solve for x
    x = 333,278,948,967.97/667,648.47
  6. Step 6: Final answer
    x = 499,183.27

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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.