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Finding the Fourth Proportional to 334.42, 501.66 and 128.98

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Solution

The fourth proportional to 334.42, 501.66 and 128.98 is: 193.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.42 : 501.66 = 128.98 : x
  2. Step 2: Convert to fraction form
    334.42/501.66 = 128.98/x
  3. Step 3: Cross multiply
    334.42x = 501.66 × 128.98
  4. Step 4: Simplify right side
    334.42x = 64,704.11
  5. Step 5: Solve for x
    x = 64,704.11/334.42
  6. Step 6: Final answer
    x = 193.48

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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.