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Finding the Fourth Proportional to 508.11, 697 and 486.84

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Solution

The fourth proportional to 508.11, 697 and 486.84 is: 667.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.11 : 697 = 486.84 : x
  2. Step 2: Convert to fraction form
    508.11/697 = 486.84/x
  3. Step 3: Cross multiply
    508.11x = 697 × 486.84
  4. Step 4: Simplify right side
    508.11x = 339,327.48
  5. Step 5: Solve for x
    x = 339,327.48/508.11
  6. Step 6: Final answer
    x = 667.82

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.