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Finding the Fourth Proportional to 646.22, 968.94 and 255.76

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Solution

The fourth proportional to 646.22, 968.94 and 255.76 is: 383.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.22 : 968.94 = 255.76 : x
  2. Step 2: Convert to fraction form
    646.22/968.94 = 255.76/x
  3. Step 3: Cross multiply
    646.22x = 968.94 × 255.76
  4. Step 4: Simplify right side
    646.22x = 247,816.09
  5. Step 5: Solve for x
    x = 247,816.09/646.22
  6. Step 6: Final answer
    x = 383.49

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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.