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Finding the Fourth Proportional to 291.39, 436.74 and 181.54

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Solution

The fourth proportional to 291.39, 436.74 and 181.54 is: 272.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.39 : 436.74 = 181.54 : x
  2. Step 2: Convert to fraction form
    291.39/436.74 = 181.54/x
  3. Step 3: Cross multiply
    291.39x = 436.74 × 181.54
  4. Step 4: Simplify right side
    291.39x = 79,284.01
  5. Step 5: Solve for x
    x = 79,284.01/291.39
  6. Step 6: Final answer
    x = 272.09

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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.