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Finding the Fourth Proportional to 667,963.26, 923,009.85 and 486,358.83

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Solution

The fourth proportional to 667,963.26, 923,009.85 and 486,358.83 is: 672,063.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,963.26 : 923,009.85 = 486,358.83 : x
  2. Step 2: Convert to fraction form
    667,963.26/923,009.85 = 486,358.83/x
  3. Step 3: Cross multiply
    667,963.26x = 923,009.85 × 486,358.83
  4. Step 4: Simplify right side
    667,963.26x = 448,913,990,724.48
  5. Step 5: Solve for x
    x = 448,913,990,724.48/667,963.26
  6. Step 6: Final answer
    x = 672,063.90

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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.