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Finding the Fourth Proportional to 424.78, 637.05 and 193.54

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Solution

The fourth proportional to 424.78, 637.05 and 193.54 is: 290.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.78 : 637.05 = 193.54 : x
  2. Step 2: Convert to fraction form
    424.78/637.05 = 193.54/x
  3. Step 3: Cross multiply
    424.78x = 637.05 × 193.54
  4. Step 4: Simplify right side
    424.78x = 123,294.66
  5. Step 5: Solve for x
    x = 123,294.66/424.78
  6. Step 6: Final answer
    x = 290.26

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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.