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Finding the Fourth Proportional to 355.88, 491.18 and 200.63

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Solution

The fourth proportional to 355.88, 491.18 and 200.63 is: 276.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.88 : 491.18 = 200.63 : x
  2. Step 2: Convert to fraction form
    355.88/491.18 = 200.63/x
  3. Step 3: Cross multiply
    355.88x = 491.18 × 200.63
  4. Step 4: Simplify right side
    355.88x = 98,541.98
  5. Step 5: Solve for x
    x = 98,541.98/355.88
  6. Step 6: Final answer
    x = 276.90

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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.