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Finding the Fourth Proportional to 513.88, 770.80 and 167.20

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Solution

The fourth proportional to 513.88, 770.80 and 167.20 is: 250.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.88 : 770.80 = 167.20 : x
  2. Step 2: Convert to fraction form
    513.88/770.80 = 167.20/x
  3. Step 3: Cross multiply
    513.88x = 770.80 × 167.20
  4. Step 4: Simplify right side
    513.88x = 128,877.76
  5. Step 5: Solve for x
    x = 128,877.76/513.88
  6. Step 6: Final answer
    x = 250.79

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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.