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Finding the Fourth Proportional to 622.68, 934.12 and 189.86

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Solution

The fourth proportional to 622.68, 934.12 and 189.86 is: 284.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.68 : 934.12 = 189.86 : x
  2. Step 2: Convert to fraction form
    622.68/934.12 = 189.86/x
  3. Step 3: Cross multiply
    622.68x = 934.12 × 189.86
  4. Step 4: Simplify right side
    622.68x = 177,352.02
  5. Step 5: Solve for x
    x = 177,352.02/622.68
  6. Step 6: Final answer
    x = 284.82

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Similar ratio
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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.