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Finding the Fourth Proportional to 356.50, 491.99 and 201.30

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Solution

The fourth proportional to 356.50, 491.99 and 201.30 is: 277.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.50 : 491.99 = 201.30 : x
  2. Step 2: Convert to fraction form
    356.50/491.99 = 201.30/x
  3. Step 3: Cross multiply
    356.50x = 491.99 × 201.30
  4. Step 4: Simplify right side
    356.50x = 99,037.59
  5. Step 5: Solve for x
    x = 99,037.59/356.50
  6. Step 6: Final answer
    x = 277.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.