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Finding the Fourth Proportional to 643.64, 965.56 and 232.92

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Solution

The fourth proportional to 643.64, 965.56 and 232.92 is: 349.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.64 : 965.56 = 232.92 : x
  2. Step 2: Convert to fraction form
    643.64/965.56 = 232.92/x
  3. Step 3: Cross multiply
    643.64x = 965.56 × 232.92
  4. Step 4: Simplify right side
    643.64x = 224,898.24
  5. Step 5: Solve for x
    x = 224,898.24/643.64
  6. Step 6: Final answer
    x = 349.42

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Double scale
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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.