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Finding the Fourth Proportional to 644.37, 966.52 and 254.35

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Solution

The fourth proportional to 644.37, 966.52 and 254.35 is: 381.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.37 : 966.52 = 254.35 : x
  2. Step 2: Convert to fraction form
    644.37/966.52 = 254.35/x
  3. Step 3: Cross multiply
    644.37x = 966.52 × 254.35
  4. Step 4: Simplify right side
    644.37x = 245,834.36
  5. Step 5: Solve for x
    x = 245,834.36/644.37
  6. Step 6: Final answer
    x = 381.51

Related Problems

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Half scale
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Double scale
Find fourth proportional to 645.37, 968.02 and 255.35
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.