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Finding the Fourth Proportional to 512.26, 768.39 and 127.51

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Solution

The fourth proportional to 512.26, 768.39 and 127.51 is: 191.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.26 : 768.39 = 127.51 : x
  2. Step 2: Convert to fraction form
    512.26/768.39 = 127.51/x
  3. Step 3: Cross multiply
    512.26x = 768.39 × 127.51
  4. Step 4: Simplify right side
    512.26x = 97,977.41
  5. Step 5: Solve for x
    x = 97,977.41/512.26
  6. Step 6: Final answer
    x = 191.27

Related Problems

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Half scale
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Double scale
Find fourth proportional to 513.26, 769.89 and 128.51
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.