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Finding the Fourth Proportional to 294, 405.86 and 189.14

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Solution

The fourth proportional to 294, 405.86 and 189.14 is: 261.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    294 : 405.86 = 189.14 : x
  2. Step 2: Convert to fraction form
    294/405.86 = 189.14/x
  3. Step 3: Cross multiply
    294x = 405.86 × 189.14
  4. Step 4: Simplify right side
    294x = 76,764.36
  5. Step 5: Solve for x
    x = 76,764.36/294
  6. Step 6: Final answer
    x = 261.10

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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.