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Finding the Fourth Proportional to 667,069.51, 920,556.31 and 361,145.97

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Solution

The fourth proportional to 667,069.51, 920,556.31 and 361,145.97 is: 498,381.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,069.51 : 920,556.31 = 361,145.97 : x
  2. Step 2: Convert to fraction form
    667,069.51/920,556.31 = 361,145.97/x
  3. Step 3: Cross multiply
    667,069.51x = 920,556.31 × 361,145.97
  4. Step 4: Simplify right side
    667,069.51x = 332,455,205,286.98
  5. Step 5: Solve for x
    x = 332,455,205,286.98/667,069.51
  6. Step 6: Final answer
    x = 498,381.65

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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.