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Finding the Fourth Proportional to 290.36, 434.97 and 153.07

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Solution

The fourth proportional to 290.36, 434.97 and 153.07 is: 229.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.36 : 434.97 = 153.07 : x
  2. Step 2: Convert to fraction form
    290.36/434.97 = 153.07/x
  3. Step 3: Cross multiply
    290.36x = 434.97 × 153.07
  4. Step 4: Simplify right side
    290.36x = 66,579.77
  5. Step 5: Solve for x
    x = 66,579.77/290.36
  6. Step 6: Final answer
    x = 229.30

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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.