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Finding the Fourth Proportional to 289.68, 399.57 and 184.80

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Solution

The fourth proportional to 289.68, 399.57 and 184.80 is: 254.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.68 : 399.57 = 184.80 : x
  2. Step 2: Convert to fraction form
    289.68/399.57 = 184.80/x
  3. Step 3: Cross multiply
    289.68x = 399.57 × 184.80
  4. Step 4: Simplify right side
    289.68x = 73,840.54
  5. Step 5: Solve for x
    x = 73,840.54/289.68
  6. Step 6: Final answer
    x = 254.90

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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.