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Finding the Fourth Proportional to 290.13, 434.78 and 107.34

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Solution

The fourth proportional to 290.13, 434.78 and 107.34 is: 160.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.13 : 434.78 = 107.34 : x
  2. Step 2: Convert to fraction form
    290.13/434.78 = 107.34/x
  3. Step 3: Cross multiply
    290.13x = 434.78 × 107.34
  4. Step 4: Simplify right side
    290.13x = 46,669.29
  5. Step 5: Solve for x
    x = 46,669.29/290.13
  6. Step 6: Final answer
    x = 160.86

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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.