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Finding the Fourth Proportional to 408,057.80, 612,086.70 and 282,086.60

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Solution

The fourth proportional to 408,057.80, 612,086.70 and 282,086.60 is: 423,129.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,057.80 : 612,086.70 = 282,086.60 : x
  2. Step 2: Convert to fraction form
    408,057.80/612,086.70 = 282,086.60/x
  3. Step 3: Cross multiply
    408,057.80x = 612,086.70 × 282,086.60
  4. Step 4: Simplify right side
    408,057.80x = 172,661,456,108.22
  5. Step 5: Solve for x
    x = 172,661,456,108.22/408,057.80
  6. Step 6: Final answer
    x = 423,129.90

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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.