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Finding the Fourth Proportional to 645.33, 968.12 and 255.52

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Solution

The fourth proportional to 645.33, 968.12 and 255.52 is: 383.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.33 : 968.12 = 255.52 : x
  2. Step 2: Convert to fraction form
    645.33/968.12 = 255.52/x
  3. Step 3: Cross multiply
    645.33x = 968.12 × 255.52
  4. Step 4: Simplify right side
    645.33x = 247,374.91
  5. Step 5: Solve for x
    x = 247,374.91/645.33
  6. Step 6: Final answer
    x = 383.33

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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.