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Finding the Fourth Proportional to 291.02, 436.41 and 154.19

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Solution

The fourth proportional to 291.02, 436.41 and 154.19 is: 231.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.02 : 436.41 = 154.19 : x
  2. Step 2: Convert to fraction form
    291.02/436.41 = 154.19/x
  3. Step 3: Cross multiply
    291.02x = 436.41 × 154.19
  4. Step 4: Simplify right side
    291.02x = 67,287.88
  5. Step 5: Solve for x
    x = 67,287.88/291.02
  6. Step 6: Final answer
    x = 231.22

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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.