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Finding the Fourth Proportional to 378.63, 567.89 and 104.66

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Solution

The fourth proportional to 378.63, 567.89 and 104.66 is: 156.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.63 : 567.89 = 104.66 : x
  2. Step 2: Convert to fraction form
    378.63/567.89 = 104.66/x
  3. Step 3: Cross multiply
    378.63x = 567.89 × 104.66
  4. Step 4: Simplify right side
    378.63x = 59,434.84
  5. Step 5: Solve for x
    x = 59,434.84/378.63
  6. Step 6: Final answer
    x = 156.97

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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.