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Finding the Fourth Proportional to 336.89, 505.40 and 131.55

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Solution

The fourth proportional to 336.89, 505.40 and 131.55 is: 197.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.89 : 505.40 = 131.55 : x
  2. Step 2: Convert to fraction form
    336.89/505.40 = 131.55/x
  3. Step 3: Cross multiply
    336.89x = 505.40 × 131.55
  4. Step 4: Simplify right side
    336.89x = 66,484.71
  5. Step 5: Solve for x
    x = 66,484.71/336.89
  6. Step 6: Final answer
    x = 197.35

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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.