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Finding the Fourth Proportional to 419.62, 630.78 and 237.36

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Solution

The fourth proportional to 419.62, 630.78 and 237.36 is: 356.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.62 : 630.78 = 237.36 : x
  2. Step 2: Convert to fraction form
    419.62/630.78 = 237.36/x
  3. Step 3: Cross multiply
    419.62x = 630.78 × 237.36
  4. Step 4: Simplify right side
    419.62x = 149,721.94
  5. Step 5: Solve for x
    x = 149,721.94/419.62
  6. Step 6: Final answer
    x = 356.80

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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.