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Finding the Fourth Proportional to 408,629.80, 612,944.70 and 319,959.10

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Solution

The fourth proportional to 408,629.80, 612,944.70 and 319,959.10 is: 479,938.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,629.80 : 612,944.70 = 319,959.10 : x
  2. Step 2: Convert to fraction form
    408,629.80/612,944.70 = 319,959.10/x
  3. Step 3: Cross multiply
    408,629.80x = 612,944.70 × 319,959.10
  4. Step 4: Simplify right side
    408,629.80x = 196,117,234,561.77
  5. Step 5: Solve for x
    x = 196,117,234,561.77/408,629.80
  6. Step 6: Final answer
    x = 479,938.65

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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.