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Finding the Fourth Proportional to 664,220.80, 996,460.80 and 285,140.80

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Solution

The fourth proportional to 664,220.80, 996,460.80 and 285,140.80 is: 427,766.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,220.80 : 996,460.80 = 285,140.80 : x
  2. Step 2: Convert to fraction form
    664,220.80/996,460.80 = 285,140.80/x
  3. Step 3: Cross multiply
    664,220.80x = 996,460.80 × 285,140.80
  4. Step 4: Simplify right side
    664,220.80x = 284,131,629,680.64
  5. Step 5: Solve for x
    x = 284,131,629,680.64/664,220.80
  6. Step 6: Final answer
    x = 427,766.84

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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.