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Finding the Fourth Proportional to 456.36, 684.44 and 131.65

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Solution

The fourth proportional to 456.36, 684.44 and 131.65 is: 197.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.36 : 684.44 = 131.65 : x
  2. Step 2: Convert to fraction form
    456.36/684.44 = 131.65/x
  3. Step 3: Cross multiply
    456.36x = 684.44 × 131.65
  4. Step 4: Simplify right side
    456.36x = 90,106.53
  5. Step 5: Solve for x
    x = 90,106.53/456.36
  6. Step 6: Final answer
    x = 197.45

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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.