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Finding the Fourth Proportional to 314.64, 472.09 and 109.23

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Solution

The fourth proportional to 314.64, 472.09 and 109.23 is: 163.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.64 : 472.09 = 109.23 : x
  2. Step 2: Convert to fraction form
    314.64/472.09 = 109.23/x
  3. Step 3: Cross multiply
    314.64x = 472.09 × 109.23
  4. Step 4: Simplify right side
    314.64x = 51,567.30
  5. Step 5: Solve for x
    x = 51,567.30/314.64
  6. Step 6: Final answer
    x = 163.90

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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.