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Finding the Fourth Proportional to 290.60, 401 and 174.16

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Solution

The fourth proportional to 290.60, 401 and 174.16 is: 240.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.60 : 401 = 174.16 : x
  2. Step 2: Convert to fraction form
    290.60/401 = 174.16/x
  3. Step 3: Cross multiply
    290.60x = 401 × 174.16
  4. Step 4: Simplify right side
    290.60x = 69,838.16
  5. Step 5: Solve for x
    x = 69,838.16/290.60
  6. Step 6: Final answer
    x = 240.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.