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Finding the Fourth Proportional to 2,157.75, 3,236.67 and 618.75

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Solution

The fourth proportional to 2,157.75, 3,236.67 and 618.75 is: 928.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.75 : 3,236.67 = 618.75 : x
  2. Step 2: Convert to fraction form
    2,157.75/3,236.67 = 618.75/x
  3. Step 3: Cross multiply
    2,157.75x = 3,236.67 × 618.75
  4. Step 4: Simplify right side
    2,157.75x = 2,002,689.56
  5. Step 5: Solve for x
    x = 2,002,689.56/2,157.75
  6. Step 6: Final answer
    x = 928.14

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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.