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Finding the Fourth Proportional to 664.76, 996.83 and 253.64

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Solution

The fourth proportional to 664.76, 996.83 and 253.64 is: 380.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.76 : 996.83 = 253.64 : x
  2. Step 2: Convert to fraction form
    664.76/996.83 = 253.64/x
  3. Step 3: Cross multiply
    664.76x = 996.83 × 253.64
  4. Step 4: Simplify right side
    664.76x = 252,834.40
  5. Step 5: Solve for x
    x = 252,834.40/664.76
  6. Step 6: Final answer
    x = 380.34

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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.