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Finding the Fourth Proportional to 661,108.20, 991,662.30 and 217,818.60

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Solution

The fourth proportional to 661,108.20, 991,662.30 and 217,818.60 is: 326,727.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,108.20 : 991,662.30 = 217,818.60 : x
  2. Step 2: Convert to fraction form
    661,108.20/991,662.30 = 217,818.60/x
  3. Step 3: Cross multiply
    661,108.20x = 991,662.30 × 217,818.60
  4. Step 4: Simplify right side
    661,108.20x = 216,002,493,858.78
  5. Step 5: Solve for x
    x = 216,002,493,858.78/661,108.20
  6. Step 6: Final answer
    x = 326,727.90

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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.