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Finding the Fourth Proportional to 515.34, 773.10 and 271.80

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Solution

The fourth proportional to 515.34, 773.10 and 271.80 is: 407.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.34 : 773.10 = 271.80 : x
  2. Step 2: Convert to fraction form
    515.34/773.10 = 271.80/x
  3. Step 3: Cross multiply
    515.34x = 773.10 × 271.80
  4. Step 4: Simplify right side
    515.34x = 210,128.58
  5. Step 5: Solve for x
    x = 210,128.58/515.34
  6. Step 6: Final answer
    x = 407.75

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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.