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Finding the Fourth Proportional to 644.21, 966.31 and 233.19

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Solution

The fourth proportional to 644.21, 966.31 and 233.19 is: 349.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.21 : 966.31 = 233.19 : x
  2. Step 2: Convert to fraction form
    644.21/966.31 = 233.19/x
  3. Step 3: Cross multiply
    644.21x = 966.31 × 233.19
  4. Step 4: Simplify right side
    644.21x = 225,332.66
  5. Step 5: Solve for x
    x = 225,332.66/644.21
  6. Step 6: Final answer
    x = 349.78

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.