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Finding the Fourth Proportional to 667,156.80, 920,669.48 and 361,227.92

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Solution

The fourth proportional to 667,156.80, 920,669.48 and 361,227.92 is: 498,490.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,156.80 : 920,669.48 = 361,227.92 : x
  2. Step 2: Convert to fraction form
    667,156.80/920,669.48 = 361,227.92/x
  3. Step 3: Cross multiply
    667,156.80x = 920,669.48 × 361,227.92
  4. Step 4: Simplify right side
    667,156.80x = 332,571,521,267.88
  5. Step 5: Solve for x
    x = 332,571,521,267.88/667,156.80
  6. Step 6: Final answer
    x = 498,490.79

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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.