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Finding the Fourth Proportional to 184.40, 276.30 and 145.72

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Solution

The fourth proportional to 184.40, 276.30 and 145.72 is: 218.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    184.40 : 276.30 = 145.72 : x
  2. Step 2: Convert to fraction form
    184.40/276.30 = 145.72/x
  3. Step 3: Cross multiply
    184.40x = 276.30 × 145.72
  4. Step 4: Simplify right side
    184.40x = 40,262.44
  5. Step 5: Solve for x
    x = 40,262.44/184.40
  6. Step 6: Final answer
    x = 218.34

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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.