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Finding the Fourth Proportional to 314.18, 471.39 and 131.56

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Solution

The fourth proportional to 314.18, 471.39 and 131.56 is: 197.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.18 : 471.39 = 131.56 : x
  2. Step 2: Convert to fraction form
    314.18/471.39 = 131.56/x
  3. Step 3: Cross multiply
    314.18x = 471.39 × 131.56
  4. Step 4: Simplify right side
    314.18x = 62,014.40
  5. Step 5: Solve for x
    x = 62,014.40/314.18
  6. Step 6: Final answer
    x = 197.39

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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.