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Finding the Fourth Proportional to 667,446.36, 921,068.34 and 361,516.92

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Solution

The fourth proportional to 667,446.36, 921,068.34 and 361,516.92 is: 498,889.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,446.36 : 921,068.34 = 361,516.92 : x
  2. Step 2: Convert to fraction form
    667,446.36/921,068.34 = 361,516.92/x
  3. Step 3: Cross multiply
    667,446.36x = 921,068.34 × 361,516.92
  4. Step 4: Simplify right side
    667,446.36x = 332,981,789,386.31
  5. Step 5: Solve for x
    x = 332,981,789,386.31/667,446.36
  6. Step 6: Final answer
    x = 498,889.21

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1.5x scale

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.