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Finding the Fourth Proportional to 2,589.72, 3,884.54 and 641.91

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Solution

The fourth proportional to 2,589.72, 3,884.54 and 641.91 is: 962.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,589.72 : 3,884.54 = 641.91 : x
  2. Step 2: Convert to fraction form
    2,589.72/3,884.54 = 641.91/x
  3. Step 3: Cross multiply
    2,589.72x = 3,884.54 × 641.91
  4. Step 4: Simplify right side
    2,589.72x = 2,493,526.68
  5. Step 5: Solve for x
    x = 2,493,526.68/2,589.72
  6. Step 6: Final answer
    x = 962.86

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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.