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Finding the Fourth Proportional to 539.11, 808.77 and 210.05

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Solution

The fourth proportional to 539.11, 808.77 and 210.05 is: 315.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.11 : 808.77 = 210.05 : x
  2. Step 2: Convert to fraction form
    539.11/808.77 = 210.05/x
  3. Step 3: Cross multiply
    539.11x = 808.77 × 210.05
  4. Step 4: Simplify right side
    539.11x = 169,882.14
  5. Step 5: Solve for x
    x = 169,882.14/539.11
  6. Step 6: Final answer
    x = 315.12

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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.