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Finding the Fourth Proportional to 408,486.60, 612,073.80 and 268,081.20

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Solution

The fourth proportional to 408,486.60, 612,073.80 and 268,081.20 is: 401,691.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,486.60 : 612,073.80 = 268,081.20 : x
  2. Step 2: Convert to fraction form
    408,486.60/612,073.80 = 268,081.20/x
  3. Step 3: Cross multiply
    408,486.60x = 612,073.80 × 268,081.20
  4. Step 4: Simplify right side
    408,486.60x = 164,085,478,792.56
  5. Step 5: Solve for x
    x = 164,085,478,792.56/408,486.60
  6. Step 6: Final answer
    x = 401,691.22

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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.