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Finding the Fourth Proportional to 375.20, 561.62 and 272.46

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Solution

The fourth proportional to 375.20, 561.62 and 272.46 is: 407.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.20 : 561.62 = 272.46 : x
  2. Step 2: Convert to fraction form
    375.20/561.62 = 272.46/x
  3. Step 3: Cross multiply
    375.20x = 561.62 × 272.46
  4. Step 4: Simplify right side
    375.20x = 153,016.65
  5. Step 5: Solve for x
    x = 153,016.65/375.20
  6. Step 6: Final answer
    x = 407.83

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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.