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Finding the Fourth Proportional to 270.11, 405.32 and 253.02

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Solution

The fourth proportional to 270.11, 405.32 and 253.02 is: 379.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.11 : 405.32 = 253.02 : x
  2. Step 2: Convert to fraction form
    270.11/405.32 = 253.02/x
  3. Step 3: Cross multiply
    270.11x = 405.32 × 253.02
  4. Step 4: Simplify right side
    270.11x = 102,556.22
  5. Step 5: Solve for x
    x = 102,556.22/270.11
  6. Step 6: Final answer
    x = 379.69

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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.