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Finding the Fourth Proportional to 334.41, 501.41 and 128.81

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Solution

The fourth proportional to 334.41, 501.41 and 128.81 is: 193.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.41 : 501.41 = 128.81 : x
  2. Step 2: Convert to fraction form
    334.41/501.41 = 128.81/x
  3. Step 3: Cross multiply
    334.41x = 501.41 × 128.81
  4. Step 4: Simplify right side
    334.41x = 64,585.38
  5. Step 5: Solve for x
    x = 64,585.38/334.41
  6. Step 6: Final answer
    x = 193.13

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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.