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Finding the Fourth Proportional to 664,200.80, 996,430.80 and 285,120.80

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Solution

The fourth proportional to 664,200.80, 996,430.80 and 285,120.80 is: 427,736.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,200.80 : 996,430.80 = 285,120.80 : x
  2. Step 2: Convert to fraction form
    664,200.80/996,430.80 = 285,120.80/x
  3. Step 3: Cross multiply
    664,200.80x = 996,430.80 × 285,120.80
  4. Step 4: Simplify right side
    664,200.80x = 284,103,146,840.64
  5. Step 5: Solve for x
    x = 284,103,146,840.64/664,200.80
  6. Step 6: Final answer
    x = 427,736.83

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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.