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Finding the Fourth Proportional to 517.02, 775.95 and 270.39

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Solution

The fourth proportional to 517.02, 775.95 and 270.39 is: 405.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.02 : 775.95 = 270.39 : x
  2. Step 2: Convert to fraction form
    517.02/775.95 = 270.39/x
  3. Step 3: Cross multiply
    517.02x = 775.95 × 270.39
  4. Step 4: Simplify right side
    517.02x = 209,809.12
  5. Step 5: Solve for x
    x = 209,809.12/517.02
  6. Step 6: Final answer
    x = 405.80

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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.