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Finding the Fourth Proportional to 303.92, 419.38 and 187.40

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Solution

The fourth proportional to 303.92, 419.38 and 187.40 is: 258.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.92 : 419.38 = 187.40 : x
  2. Step 2: Convert to fraction form
    303.92/419.38 = 187.40/x
  3. Step 3: Cross multiply
    303.92x = 419.38 × 187.40
  4. Step 4: Simplify right side
    303.92x = 78,591.81
  5. Step 5: Solve for x
    x = 78,591.81/303.92
  6. Step 6: Final answer
    x = 258.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.