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Finding the Fourth Proportional to 667,454.15, 921,087.02 and 361,529.61

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Solution

The fourth proportional to 667,454.15, 921,087.02 and 361,529.61 is: 498,911.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,454.15 : 921,087.02 = 361,529.61 : x
  2. Step 2: Convert to fraction form
    667,454.15/921,087.02 = 361,529.61/x
  3. Step 3: Cross multiply
    667,454.15x = 921,087.02 × 361,529.61
  4. Step 4: Simplify right side
    667,454.15x = 333,000,229,309.01
  5. Step 5: Solve for x
    x = 333,000,229,309.01/667,454.15
  6. Step 6: Final answer
    x = 498,911.02

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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.