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Finding the Fourth Proportional to 408,052.60, 612,078.90 and 405,719.80

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Solution

The fourth proportional to 408,052.60, 612,078.90 and 405,719.80 is: 608,579.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,052.60 : 612,078.90 = 405,719.80 : x
  2. Step 2: Convert to fraction form
    408,052.60/612,078.90 = 405,719.80/x
  3. Step 3: Cross multiply
    408,052.60x = 612,078.90 × 405,719.80
  4. Step 4: Simplify right side
    408,052.60x = 248,332,528,892.22
  5. Step 5: Solve for x
    x = 248,332,528,892.22/408,052.60
  6. Step 6: Final answer
    x = 608,579.70

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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.