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Finding the Fourth Proportional to 313.86, 433.31 and 203.50

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Solution

The fourth proportional to 313.86, 433.31 and 203.50 is: 280.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.86 : 433.31 = 203.50 : x
  2. Step 2: Convert to fraction form
    313.86/433.31 = 203.50/x
  3. Step 3: Cross multiply
    313.86x = 433.31 × 203.50
  4. Step 4: Simplify right side
    313.86x = 88,177.57
  5. Step 5: Solve for x
    x = 88,177.57/313.86
  6. Step 6: Final answer
    x = 280.95

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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.