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Finding the Fourth Proportional to 667,046.43, 920,522.93 and 361,122.69

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Solution

The fourth proportional to 667,046.43, 920,522.93 and 361,122.69 is: 498,348.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,046.43 : 920,522.93 = 361,122.69 : x
  2. Step 2: Convert to fraction form
    667,046.43/920,522.93 = 361,122.69/x
  3. Step 3: Cross multiply
    667,046.43x = 920,522.93 × 361,122.69
  4. Step 4: Simplify right side
    667,046.43x = 332,421,714,882.67
  5. Step 5: Solve for x
    x = 332,421,714,882.67/667,046.43
  6. Step 6: Final answer
    x = 498,348.69

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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.