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Finding the Fourth Proportional to 314.13, 470.85 and 131.64

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Solution

The fourth proportional to 314.13, 470.85 and 131.64 is: 197.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.13 : 470.85 = 131.64 : x
  2. Step 2: Convert to fraction form
    314.13/470.85 = 131.64/x
  3. Step 3: Cross multiply
    314.13x = 470.85 × 131.64
  4. Step 4: Simplify right side
    314.13x = 61,982.69
  5. Step 5: Solve for x
    x = 61,982.69/314.13
  6. Step 6: Final answer
    x = 197.32

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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.