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Finding the Fourth Proportional to 369.74, 553.39 and 356.78

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Solution

The fourth proportional to 369.74, 553.39 and 356.78 is: 533.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.74 : 553.39 = 356.78 : x
  2. Step 2: Convert to fraction form
    369.74/553.39 = 356.78/x
  3. Step 3: Cross multiply
    369.74x = 553.39 × 356.78
  4. Step 4: Simplify right side
    369.74x = 197,438.48
  5. Step 5: Solve for x
    x = 197,438.48/369.74
  6. Step 6: Final answer
    x = 533.99

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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.