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Finding the Fourth Proportional to 313.09, 469.63 and 107.65

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Solution

The fourth proportional to 313.09, 469.63 and 107.65 is: 161.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.09 : 469.63 = 107.65 : x
  2. Step 2: Convert to fraction form
    313.09/469.63 = 107.65/x
  3. Step 3: Cross multiply
    313.09x = 469.63 × 107.65
  4. Step 4: Simplify right side
    313.09x = 50,556.39
  5. Step 5: Solve for x
    x = 50,556.39/313.09
  6. Step 6: Final answer
    x = 161.48

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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.