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Finding the Fourth Proportional to 409.78, 614.82 and 193.51

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Solution

The fourth proportional to 409.78, 614.82 and 193.51 is: 290.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.78 : 614.82 = 193.51 : x
  2. Step 2: Convert to fraction form
    409.78/614.82 = 193.51/x
  3. Step 3: Cross multiply
    409.78x = 614.82 × 193.51
  4. Step 4: Simplify right side
    409.78x = 118,973.82
  5. Step 5: Solve for x
    x = 118,973.82/409.78
  6. Step 6: Final answer
    x = 290.34

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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.