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Finding the Fourth Proportional to 290.47, 400.89 and 174.10

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Solution

The fourth proportional to 290.47, 400.89 and 174.10 is: 240.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.47 : 400.89 = 174.10 : x
  2. Step 2: Convert to fraction form
    290.47/400.89 = 174.10/x
  3. Step 3: Cross multiply
    290.47x = 400.89 × 174.10
  4. Step 4: Simplify right side
    290.47x = 69,794.95
  5. Step 5: Solve for x
    x = 69,794.95/290.47
  6. Step 6: Final answer
    x = 240.28

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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.