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Finding the Fourth Proportional to 368.74, 551.89 and 355.78

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Solution

The fourth proportional to 368.74, 551.89 and 355.78 is: 532.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.74 : 551.89 = 355.78 : x
  2. Step 2: Convert to fraction form
    368.74/551.89 = 355.78/x
  3. Step 3: Cross multiply
    368.74x = 551.89 × 355.78
  4. Step 4: Simplify right side
    368.74x = 196,351.42
  5. Step 5: Solve for x
    x = 196,351.42/368.74
  6. Step 6: Final answer
    x = 532.49

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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.