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Finding the Fourth Proportional to 290.61, 400.61 and 228.24

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Solution

The fourth proportional to 290.61, 400.61 and 228.24 is: 314.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.61 : 400.61 = 228.24 : x
  2. Step 2: Convert to fraction form
    290.61/400.61 = 228.24/x
  3. Step 3: Cross multiply
    290.61x = 400.61 × 228.24
  4. Step 4: Simplify right side
    290.61x = 91,435.23
  5. Step 5: Solve for x
    x = 91,435.23/290.61
  6. Step 6: Final answer
    x = 314.63

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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.