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Finding the Fourth Proportional to 290.26, 433.42 and 228.70

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Solution

The fourth proportional to 290.26, 433.42 and 228.70 is: 341.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.26 : 433.42 = 228.70 : x
  2. Step 2: Convert to fraction form
    290.26/433.42 = 228.70/x
  3. Step 3: Cross multiply
    290.26x = 433.42 × 228.70
  4. Step 4: Simplify right side
    290.26x = 99,123.15
  5. Step 5: Solve for x
    x = 99,123.15/290.26
  6. Step 6: Final answer
    x = 341.50

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.