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Finding the Fourth Proportional to 183.87, 253.60 and 118.40

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Solution

The fourth proportional to 183.87, 253.60 and 118.40 is: 163.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.87 : 253.60 = 118.40 : x
  2. Step 2: Convert to fraction form
    183.87/253.60 = 118.40/x
  3. Step 3: Cross multiply
    183.87x = 253.60 × 118.40
  4. Step 4: Simplify right side
    183.87x = 30,024.68
  5. Step 5: Solve for x
    x = 30,024.68/183.87
  6. Step 6: Final answer
    x = 163.29

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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.