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Finding the Fourth Proportional to 644.10, 966.12 and 181.86

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Solution

The fourth proportional to 644.10, 966.12 and 181.86 is: 272.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.10 : 966.12 = 181.86 : x
  2. Step 2: Convert to fraction form
    644.10/966.12 = 181.86/x
  3. Step 3: Cross multiply
    644.10x = 966.12 × 181.86
  4. Step 4: Simplify right side
    644.10x = 175,698.58
  5. Step 5: Solve for x
    x = 175,698.58/644.10
  6. Step 6: Final answer
    x = 272.78

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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.