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Finding the Fourth Proportional to 2,568.89, 3,853.35 and 621.11

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Solution

The fourth proportional to 2,568.89, 3,853.35 and 621.11 is: 931.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,568.89 : 3,853.35 = 621.11 : x
  2. Step 2: Convert to fraction form
    2,568.89/3,853.35 = 621.11/x
  3. Step 3: Cross multiply
    2,568.89x = 3,853.35 × 621.11
  4. Step 4: Simplify right side
    2,568.89x = 2,393,334.95
  5. Step 5: Solve for x
    x = 2,393,334.95/2,568.89
  6. Step 6: Final answer
    x = 931.66

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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.