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Finding the Fourth Proportional to 661,672.80, 990,540.90 and 437,286.60

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Solution

The fourth proportional to 661,672.80, 990,540.90 and 437,286.60 is: 654,629.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,672.80 : 990,540.90 = 437,286.60 : x
  2. Step 2: Convert to fraction form
    661,672.80/990,540.90 = 437,286.60/x
  3. Step 3: Cross multiply
    661,672.80x = 990,540.90 × 437,286.60
  4. Step 4: Simplify right side
    661,672.80x = 433,150,262,321.94
  5. Step 5: Solve for x
    x = 433,150,262,321.94/661,672.80
  6. Step 6: Final answer
    x = 654,629.09

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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.