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Finding the Fourth Proportional to 291.13, 436.36 and 144.84

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Solution

The fourth proportional to 291.13, 436.36 and 144.84 is: 217.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.13 : 436.36 = 144.84 : x
  2. Step 2: Convert to fraction form
    291.13/436.36 = 144.84/x
  3. Step 3: Cross multiply
    291.13x = 436.36 × 144.84
  4. Step 4: Simplify right side
    291.13x = 63,201.75
  5. Step 5: Solve for x
    x = 63,201.75/291.13
  6. Step 6: Final answer
    x = 217.09

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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.