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Finding the Fourth Proportional to 313.55, 470.39 and 151.21

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Solution

The fourth proportional to 313.55, 470.39 and 151.21 is: 226.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.55 : 470.39 = 151.21 : x
  2. Step 2: Convert to fraction form
    313.55/470.39 = 151.21/x
  3. Step 3: Cross multiply
    313.55x = 470.39 × 151.21
  4. Step 4: Simplify right side
    313.55x = 71,125.74
  5. Step 5: Solve for x
    x = 71,125.74/313.55
  6. Step 6: Final answer
    x = 226.84

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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.