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Finding the Fourth Proportional to 513.79, 770.85 and 270.48

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Solution

The fourth proportional to 513.79, 770.85 and 270.48 is: 405.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.79 : 770.85 = 270.48 : x
  2. Step 2: Convert to fraction form
    513.79/770.85 = 270.48/x
  3. Step 3: Cross multiply
    513.79x = 770.85 × 270.48
  4. Step 4: Simplify right side
    513.79x = 208,499.51
  5. Step 5: Solve for x
    x = 208,499.51/513.79
  6. Step 6: Final answer
    x = 405.81

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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.