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Finding the Fourth Proportional to 513.51, 771.66 and 270.15

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Solution

The fourth proportional to 513.51, 771.66 and 270.15 is: 405.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.51 : 771.66 = 270.15 : x
  2. Step 2: Convert to fraction form
    513.51/771.66 = 270.15/x
  3. Step 3: Cross multiply
    513.51x = 771.66 × 270.15
  4. Step 4: Simplify right side
    513.51x = 208,463.95
  5. Step 5: Solve for x
    x = 208,463.95/513.51
  6. Step 6: Final answer
    x = 405.96

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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.