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Finding the Fourth Proportional to 336.96, 505.16 and 131.40

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Solution

The fourth proportional to 336.96, 505.16 and 131.40 is: 196.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.96 : 505.16 = 131.40 : x
  2. Step 2: Convert to fraction form
    336.96/505.16 = 131.40/x
  3. Step 3: Cross multiply
    336.96x = 505.16 × 131.40
  4. Step 4: Simplify right side
    336.96x = 66,378.02
  5. Step 5: Solve for x
    x = 66,378.02/336.96
  6. Step 6: Final answer
    x = 196.99

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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.