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Finding the Fourth Proportional to 325.81, 488.65 and 130.80

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Solution

The fourth proportional to 325.81, 488.65 and 130.80 is: 196.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.81 : 488.65 = 130.80 : x
  2. Step 2: Convert to fraction form
    325.81/488.65 = 130.80/x
  3. Step 3: Cross multiply
    325.81x = 488.65 × 130.80
  4. Step 4: Simplify right side
    325.81x = 63,914.42
  5. Step 5: Solve for x
    x = 63,914.42/325.81
  6. Step 6: Final answer
    x = 196.17

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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.