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Finding the Fourth Proportional to 515.32, 772.57 and 255.14

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Solution

The fourth proportional to 515.32, 772.57 and 255.14 is: 382.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.32 : 772.57 = 255.14 : x
  2. Step 2: Convert to fraction form
    515.32/772.57 = 255.14/x
  3. Step 3: Cross multiply
    515.32x = 772.57 × 255.14
  4. Step 4: Simplify right side
    515.32x = 197,109.65
  5. Step 5: Solve for x
    x = 197,109.65/515.32
  6. Step 6: Final answer
    x = 382.50

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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.