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Finding the Fourth Proportional to 316,988.71, 437,489.21 and 196,168.90

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Solution

The fourth proportional to 316,988.71, 437,489.21 and 196,168.90 is: 270,740.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,988.71 : 437,489.21 = 196,168.90 : x
  2. Step 2: Convert to fraction form
    316,988.71/437,489.21 = 196,168.90/x
  3. Step 3: Cross multiply
    316,988.71x = 437,489.21 × 196,168.90
  4. Step 4: Simplify right side
    316,988.71x = 85,821,777,087.57
  5. Step 5: Solve for x
    x = 85,821,777,087.57/316,988.71
  6. Step 6: Final answer
    x = 270,740.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.