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Finding the Fourth Proportional to 350.16, 481.68 and 290.40

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Solution

The fourth proportional to 350.16, 481.68 and 290.40 is: 399.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.16 : 481.68 = 290.40 : x
  2. Step 2: Convert to fraction form
    350.16/481.68 = 290.40/x
  3. Step 3: Cross multiply
    350.16x = 481.68 × 290.40
  4. Step 4: Simplify right side
    350.16x = 139,879.87
  5. Step 5: Solve for x
    x = 139,879.87/350.16
  6. Step 6: Final answer
    x = 399.47

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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.