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Finding the Fourth Proportional to 645.26, 967.55 and 255.25

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Solution

The fourth proportional to 645.26, 967.55 and 255.25 is: 382.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.26 : 967.55 = 255.25 : x
  2. Step 2: Convert to fraction form
    645.26/967.55 = 255.25/x
  3. Step 3: Cross multiply
    645.26x = 967.55 × 255.25
  4. Step 4: Simplify right side
    645.26x = 246,965.36
  5. Step 5: Solve for x
    x = 246,965.36/645.26
  6. Step 6: Final answer
    x = 382.74

Related Problems

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Half scale
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Double scale
Find fourth proportional to 646.26, 969.05 and 256.25
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.