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Finding the Fourth Proportional to 511.68, 767.04 and 255.12

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Solution

The fourth proportional to 511.68, 767.04 and 255.12 is: 382.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.68 : 767.04 = 255.12 : x
  2. Step 2: Convert to fraction form
    511.68/767.04 = 255.12/x
  3. Step 3: Cross multiply
    511.68x = 767.04 × 255.12
  4. Step 4: Simplify right side
    511.68x = 195,687.24
  5. Step 5: Solve for x
    x = 195,687.24/511.68
  6. Step 6: Final answer
    x = 382.44

Related Problems

Find fourth proportional to 255.84, 383.52 and 127.56
Half scale
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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.