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Finding the Fourth Proportional to 313.63, 470.45 and 151.28

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Solution

The fourth proportional to 313.63, 470.45 and 151.28 is: 226.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.63 : 470.45 = 151.28 : x
  2. Step 2: Convert to fraction form
    313.63/470.45 = 151.28/x
  3. Step 3: Cross multiply
    313.63x = 470.45 × 151.28
  4. Step 4: Simplify right side
    313.63x = 71,169.68
  5. Step 5: Solve for x
    x = 71,169.68/313.63
  6. Step 6: Final answer
    x = 226.92

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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.