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Finding the Fourth Proportional to 313.76, 433.32 and 276.68

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Solution

The fourth proportional to 313.76, 433.32 and 276.68 is: 382.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.76 : 433.32 = 276.68 : x
  2. Step 2: Convert to fraction form
    313.76/433.32 = 276.68/x
  3. Step 3: Cross multiply
    313.76x = 433.32 × 276.68
  4. Step 4: Simplify right side
    313.76x = 119,890.98
  5. Step 5: Solve for x
    x = 119,890.98/313.76
  6. Step 6: Final answer
    x = 382.11

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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.