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Finding the Fourth Proportional to 408,047.20, 612,070.80 and 399,299.20

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Solution

The fourth proportional to 408,047.20, 612,070.80 and 399,299.20 is: 598,948.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,047.20 : 612,070.80 = 399,299.20 : x
  2. Step 2: Convert to fraction form
    408,047.20/612,070.80 = 399,299.20/x
  3. Step 3: Cross multiply
    408,047.20x = 612,070.80 × 399,299.20
  4. Step 4: Simplify right side
    408,047.20x = 244,399,380,783.36
  5. Step 5: Solve for x
    x = 244,399,380,783.36/408,047.20
  6. Step 6: Final answer
    x = 598,948.80

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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.