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Finding the Fourth Proportional to 634.40, 944.84 and 611.72

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Solution

The fourth proportional to 634.40, 944.84 and 611.72 is: 911.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.40 : 944.84 = 611.72 : x
  2. Step 2: Convert to fraction form
    634.40/944.84 = 611.72/x
  3. Step 3: Cross multiply
    634.40x = 944.84 × 611.72
  4. Step 4: Simplify right side
    634.40x = 577,977.52
  5. Step 5: Solve for x
    x = 577,977.52/634.40
  6. Step 6: Final answer
    x = 911.06

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.