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Finding the Fourth Proportional to 290.60, 436.38 and 266.28

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Solution

The fourth proportional to 290.60, 436.38 and 266.28 is: 399.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.60 : 436.38 = 266.28 : x
  2. Step 2: Convert to fraction form
    290.60/436.38 = 266.28/x
  3. Step 3: Cross multiply
    290.60x = 436.38 × 266.28
  4. Step 4: Simplify right side
    290.60x = 116,199.27
  5. Step 5: Solve for x
    x = 116,199.27/290.60
  6. Step 6: Final answer
    x = 399.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.