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Finding the Fourth Proportional to 1,222,454.92, 1,834,889.16 and 917,789.42

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Solution

The fourth proportional to 1,222,454.92, 1,834,889.16 and 917,789.42 is: 1,377,590.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,454.92 : 1,834,889.16 = 917,789.42 : x
  2. Step 2: Convert to fraction form
    1,222,454.92/1,834,889.16 = 917,789.42/x
  3. Step 3: Cross multiply
    1,222,454.92x = 1,834,889.16 × 917,789.42
  4. Step 4: Simplify right side
    1,222,454.92x = 1,684,041,857,920.69
  5. Step 5: Solve for x
    x = 1,684,041,857,920.69/1,222,454.92
  6. Step 6: Final answer
    x = 1,377,590.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.