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Finding the Fourth Proportional to 513.25, 770.01 and 256.75

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Solution

The fourth proportional to 513.25, 770.01 and 256.75 is: 385.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.25 : 770.01 = 256.75 : x
  2. Step 2: Convert to fraction form
    513.25/770.01 = 256.75/x
  3. Step 3: Cross multiply
    513.25x = 770.01 × 256.75
  4. Step 4: Simplify right side
    513.25x = 197,700.07
  5. Step 5: Solve for x
    x = 197,700.07/513.25
  6. Step 6: Final answer
    x = 385.19

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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.