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Finding the Fourth Proportional to 664,426.40, 996,639.60 and 660,489.80

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Solution

The fourth proportional to 664,426.40, 996,639.60 and 660,489.80 is: 990,734.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,426.40 : 996,639.60 = 660,489.80 : x
  2. Step 2: Convert to fraction form
    664,426.40/996,639.60 = 660,489.80/x
  3. Step 3: Cross multiply
    664,426.40x = 996,639.60 × 660,489.80
  4. Step 4: Simplify right side
    664,426.40x = 658,270,290,076.08
  5. Step 5: Solve for x
    x = 658,270,290,076.08/664,426.40
  6. Step 6: Final answer
    x = 990,734.70

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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.