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Finding the Fourth Proportional to 313.99, 471.17 and 131.37

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Solution

The fourth proportional to 313.99, 471.17 and 131.37 is: 197.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.99 : 471.17 = 131.37 : x
  2. Step 2: Convert to fraction form
    313.99/471.17 = 131.37/x
  3. Step 3: Cross multiply
    313.99x = 471.17 × 131.37
  4. Step 4: Simplify right side
    313.99x = 61,895.18
  5. Step 5: Solve for x
    x = 61,895.18/313.99
  6. Step 6: Final answer
    x = 197.13

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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.