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Finding the Fourth Proportional to 513.72, 770.72 and 340.89

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Solution

The fourth proportional to 513.72, 770.72 and 340.89 is: 511.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.72 : 770.72 = 340.89 : x
  2. Step 2: Convert to fraction form
    513.72/770.72 = 340.89/x
  3. Step 3: Cross multiply
    513.72x = 770.72 × 340.89
  4. Step 4: Simplify right side
    513.72x = 262,730.74
  5. Step 5: Solve for x
    x = 262,730.74/513.72
  6. Step 6: Final answer
    x = 511.43

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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.