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Finding the Fourth Proportional to 368.67, 553.78 and 356.38

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Solution

The fourth proportional to 368.67, 553.78 and 356.38 is: 535.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.67 : 553.78 = 356.38 : x
  2. Step 2: Convert to fraction form
    368.67/553.78 = 356.38/x
  3. Step 3: Cross multiply
    368.67x = 553.78 × 356.38
  4. Step 4: Simplify right side
    368.67x = 197,356.12
  5. Step 5: Solve for x
    x = 197,356.12/368.67
  6. Step 6: Final answer
    x = 535.32

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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.