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Finding the Fourth Proportional to 539.48, 808.74 and 311

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Solution

The fourth proportional to 539.48, 808.74 and 311 is: 466.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.48 : 808.74 = 311 : x
  2. Step 2: Convert to fraction form
    539.48/808.74 = 311/x
  3. Step 3: Cross multiply
    539.48x = 808.74 × 311
  4. Step 4: Simplify right side
    539.48x = 251,518.14
  5. Step 5: Solve for x
    x = 251,518.14/539.48
  6. Step 6: Final answer
    x = 466.22

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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.