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Finding the Fourth Proportional to 313.36, 470.06 and 128.27

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Solution

The fourth proportional to 313.36, 470.06 and 128.27 is: 192.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.36 : 470.06 = 128.27 : x
  2. Step 2: Convert to fraction form
    313.36/470.06 = 128.27/x
  3. Step 3: Cross multiply
    313.36x = 470.06 × 128.27
  4. Step 4: Simplify right side
    313.36x = 60,296.09
  5. Step 5: Solve for x
    x = 60,296.09/313.36
  6. Step 6: Final answer
    x = 192.42

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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.