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Finding the Fourth Proportional to 645.03, 967.58 and 234.21

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Solution

The fourth proportional to 645.03, 967.58 and 234.21 is: 351.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.03 : 967.58 = 234.21 : x
  2. Step 2: Convert to fraction form
    645.03/967.58 = 234.21/x
  3. Step 3: Cross multiply
    645.03x = 967.58 × 234.21
  4. Step 4: Simplify right side
    645.03x = 226,617.50
  5. Step 5: Solve for x
    x = 226,617.50/645.03
  6. Step 6: Final answer
    x = 351.33

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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.