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Finding the Fourth Proportional to 355.87, 490.63 and 245.15

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Solution

The fourth proportional to 355.87, 490.63 and 245.15 is: 337.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.87 : 490.63 = 245.15 : x
  2. Step 2: Convert to fraction form
    355.87/490.63 = 245.15/x
  3. Step 3: Cross multiply
    355.87x = 490.63 × 245.15
  4. Step 4: Simplify right side
    355.87x = 120,277.94
  5. Step 5: Solve for x
    x = 120,277.94/355.87
  6. Step 6: Final answer
    x = 337.98

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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.