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Finding the Fourth Proportional to 290.91, 436.38 and 169.08

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Solution

The fourth proportional to 290.91, 436.38 and 169.08 is: 253.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.91 : 436.38 = 169.08 : x
  2. Step 2: Convert to fraction form
    290.91/436.38 = 169.08/x
  3. Step 3: Cross multiply
    290.91x = 436.38 × 169.08
  4. Step 4: Simplify right side
    290.91x = 73,783.13
  5. Step 5: Solve for x
    x = 73,783.13/290.91
  6. Step 6: Final answer
    x = 253.63

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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.