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Finding the Fourth Proportional to 294.34, 405.86 and 189.45

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Solution

The fourth proportional to 294.34, 405.86 and 189.45 is: 261.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.34 : 405.86 = 189.45 : x
  2. Step 2: Convert to fraction form
    294.34/405.86 = 189.45/x
  3. Step 3: Cross multiply
    294.34x = 405.86 × 189.45
  4. Step 4: Simplify right side
    294.34x = 76,890.18
  5. Step 5: Solve for x
    x = 76,890.18/294.34
  6. Step 6: Final answer
    x = 261.23

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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.