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Finding the Fourth Proportional to 408,630.80, 612,946.20 and 319,960.10

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Solution

The fourth proportional to 408,630.80, 612,946.20 and 319,960.10 is: 479,940.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,630.80 : 612,946.20 = 319,960.10 : x
  2. Step 2: Convert to fraction form
    408,630.80/612,946.20 = 319,960.10/x
  3. Step 3: Cross multiply
    408,630.80x = 612,946.20 × 319,960.10
  4. Step 4: Simplify right side
    408,630.80x = 196,118,327,446.62
  5. Step 5: Solve for x
    x = 196,118,327,446.62/408,630.80
  6. Step 6: Final answer
    x = 479,940.15

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Similar ratio
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1.5x scale

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.