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Finding the Fourth Proportional to 355.31, 490.27 and 200.03

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Solution

The fourth proportional to 355.31, 490.27 and 200.03 is: 276.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.31 : 490.27 = 200.03 : x
  2. Step 2: Convert to fraction form
    355.31/490.27 = 200.03/x
  3. Step 3: Cross multiply
    355.31x = 490.27 × 200.03
  4. Step 4: Simplify right side
    355.31x = 98,068.71
  5. Step 5: Solve for x
    x = 98,068.71/355.31
  6. Step 6: Final answer
    x = 276.01

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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.