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Finding the Fourth Proportional to 644.82, 966.99 and 274.23

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Solution

The fourth proportional to 644.82, 966.99 and 274.23 is: 411.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.82 : 966.99 = 274.23 : x
  2. Step 2: Convert to fraction form
    644.82/966.99 = 274.23/x
  3. Step 3: Cross multiply
    644.82x = 966.99 × 274.23
  4. Step 4: Simplify right side
    644.82x = 265,177.67
  5. Step 5: Solve for x
    x = 265,177.67/644.82
  6. Step 6: Final answer
    x = 411.24

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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.