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Finding the Fourth Proportional to 293.34, 405.30 and 231.30

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Solution

The fourth proportional to 293.34, 405.30 and 231.30 is: 319.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.34 : 405.30 = 231.30 : x
  2. Step 2: Convert to fraction form
    293.34/405.30 = 231.30/x
  3. Step 3: Cross multiply
    293.34x = 405.30 × 231.30
  4. Step 4: Simplify right side
    293.34x = 93,745.89
  5. Step 5: Solve for x
    x = 93,745.89/293.34
  6. Step 6: Final answer
    x = 319.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.