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Finding the Fourth Proportional to 314.35, 471.57 and 131.87

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Solution

The fourth proportional to 314.35, 471.57 and 131.87 is: 197.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.35 : 471.57 = 131.87 : x
  2. Step 2: Convert to fraction form
    314.35/471.57 = 131.87/x
  3. Step 3: Cross multiply
    314.35x = 471.57 × 131.87
  4. Step 4: Simplify right side
    314.35x = 62,185.94
  5. Step 5: Solve for x
    x = 62,185.94/314.35
  6. Step 6: Final answer
    x = 197.82

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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.