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Finding the Fourth Proportional to 291.06, 401.64 and 180.54

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Solution

The fourth proportional to 291.06, 401.64 and 180.54 is: 249.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.06 : 401.64 = 180.54 : x
  2. Step 2: Convert to fraction form
    291.06/401.64 = 180.54/x
  3. Step 3: Cross multiply
    291.06x = 401.64 × 180.54
  4. Step 4: Simplify right side
    291.06x = 72,512.09
  5. Step 5: Solve for x
    x = 72,512.09/291.06
  6. Step 6: Final answer
    x = 249.13

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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.