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Finding the Fourth Proportional to 516.25, 774.35 and 256.15

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Solution

The fourth proportional to 516.25, 774.35 and 256.15 is: 384.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.25 : 774.35 = 256.15 : x
  2. Step 2: Convert to fraction form
    516.25/774.35 = 256.15/x
  3. Step 3: Cross multiply
    516.25x = 774.35 × 256.15
  4. Step 4: Simplify right side
    516.25x = 198,349.75
  5. Step 5: Solve for x
    x = 198,349.75/516.25
  6. Step 6: Final answer
    x = 384.21

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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.