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Finding the Fourth Proportional to 516.70, 774.86 and 151.40

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Solution

The fourth proportional to 516.70, 774.86 and 151.40 is: 227.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.70 : 774.86 = 151.40 : x
  2. Step 2: Convert to fraction form
    516.70/774.86 = 151.40/x
  3. Step 3: Cross multiply
    516.70x = 774.86 × 151.40
  4. Step 4: Simplify right side
    516.70x = 117,313.80
  5. Step 5: Solve for x
    x = 117,313.80/516.70
  6. Step 6: Final answer
    x = 227.04

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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.