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Finding the Fourth Proportional to 313.98, 471.29 and 131.49

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Solution

The fourth proportional to 313.98, 471.29 and 131.49 is: 197.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.98 : 471.29 = 131.49 : x
  2. Step 2: Convert to fraction form
    313.98/471.29 = 131.49/x
  3. Step 3: Cross multiply
    313.98x = 471.29 × 131.49
  4. Step 4: Simplify right side
    313.98x = 61,969.26
  5. Step 5: Solve for x
    x = 61,969.26/313.98
  6. Step 6: Final answer
    x = 197.37

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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.