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Finding the Fourth Proportional to 808,641.70, 1,212,792.45 and 408,906.70

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Solution

The fourth proportional to 808,641.70, 1,212,792.45 and 408,906.70 is: 613,274.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,641.70 : 1,212,792.45 = 408,906.70 : x
  2. Step 2: Convert to fraction form
    808,641.70/1,212,792.45 = 408,906.70/x
  3. Step 3: Cross multiply
    808,641.70x = 1,212,792.45 × 408,906.70
  4. Step 4: Simplify right side
    808,641.70x = 495,918,958,514.42
  5. Step 5: Solve for x
    x = 495,918,958,514.42/808,641.70
  6. Step 6: Final answer
    x = 613,274.04

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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.