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Finding the Fourth Proportional to 2,190.54, 3,286.27 and 630.79

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Solution

The fourth proportional to 2,190.54, 3,286.27 and 630.79 is: 946.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.54 : 3,286.27 = 630.79 : x
  2. Step 2: Convert to fraction form
    2,190.54/3,286.27 = 630.79/x
  3. Step 3: Cross multiply
    2,190.54x = 3,286.27 × 630.79
  4. Step 4: Simplify right side
    2,190.54x = 2,072,938.83
  5. Step 5: Solve for x
    x = 2,072,938.83/2,190.54
  6. Step 6: Final answer
    x = 946.31

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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.