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Finding the Fourth Proportional to 2,589.50, 3,884.28 and 641.72

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Solution

The fourth proportional to 2,589.50, 3,884.28 and 641.72 is: 962.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,589.50 : 3,884.28 = 641.72 : x
  2. Step 2: Convert to fraction form
    2,589.50/3,884.28 = 641.72/x
  3. Step 3: Cross multiply
    2,589.50x = 3,884.28 × 641.72
  4. Step 4: Simplify right side
    2,589.50x = 2,492,620.16
  5. Step 5: Solve for x
    x = 2,492,620.16/2,589.50
  6. Step 6: Final answer
    x = 962.59

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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.