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Finding the Fourth Proportional to 290.16, 434.87 and 251.49

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Solution

The fourth proportional to 290.16, 434.87 and 251.49 is: 376.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.16 : 434.87 = 251.49 : x
  2. Step 2: Convert to fraction form
    290.16/434.87 = 251.49/x
  3. Step 3: Cross multiply
    290.16x = 434.87 × 251.49
  4. Step 4: Simplify right side
    290.16x = 109,362.57
  5. Step 5: Solve for x
    x = 109,362.57/290.16
  6. Step 6: Final answer
    x = 376.90

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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.