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Finding the Fourth Proportional to 375.35, 563.05 and 128.55

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Solution

The fourth proportional to 375.35, 563.05 and 128.55 is: 192.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.35 : 563.05 = 128.55 : x
  2. Step 2: Convert to fraction form
    375.35/563.05 = 128.55/x
  3. Step 3: Cross multiply
    375.35x = 563.05 × 128.55
  4. Step 4: Simplify right side
    375.35x = 72,380.08
  5. Step 5: Solve for x
    x = 72,380.08/375.35
  6. Step 6: Final answer
    x = 192.83

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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.