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Finding the Fourth Proportional to 290.52, 436.27 and 160.78

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Solution

The fourth proportional to 290.52, 436.27 and 160.78 is: 241.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.52 : 436.27 = 160.78 : x
  2. Step 2: Convert to fraction form
    290.52/436.27 = 160.78/x
  3. Step 3: Cross multiply
    290.52x = 436.27 × 160.78
  4. Step 4: Simplify right side
    290.52x = 70,143.49
  5. Step 5: Solve for x
    x = 70,143.49/290.52
  6. Step 6: Final answer
    x = 241.45

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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.