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Finding the Fourth Proportional to 313.87, 470.21 and 262.84

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Solution

The fourth proportional to 313.87, 470.21 and 262.84 is: 393.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.87 : 470.21 = 262.84 : x
  2. Step 2: Convert to fraction form
    313.87/470.21 = 262.84/x
  3. Step 3: Cross multiply
    313.87x = 470.21 × 262.84
  4. Step 4: Simplify right side
    313.87x = 123,588.68
  5. Step 5: Solve for x
    x = 123,588.68/313.87
  6. Step 6: Final answer
    x = 393.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.