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Finding the Fourth Proportional to 334.10, 500.70 and 128.48

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Solution

The fourth proportional to 334.10, 500.70 and 128.48 is: 192.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.10 : 500.70 = 128.48 : x
  2. Step 2: Convert to fraction form
    334.10/500.70 = 128.48/x
  3. Step 3: Cross multiply
    334.10x = 500.70 × 128.48
  4. Step 4: Simplify right side
    334.10x = 64,329.94
  5. Step 5: Solve for x
    x = 64,329.94/334.10
  6. Step 6: Final answer
    x = 192.55

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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.