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Finding the Fourth Proportional to 290.12, 399.33 and 248.63

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Solution

The fourth proportional to 290.12, 399.33 and 248.63 is: 342.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.12 : 399.33 = 248.63 : x
  2. Step 2: Convert to fraction form
    290.12/399.33 = 248.63/x
  3. Step 3: Cross multiply
    290.12x = 399.33 × 248.63
  4. Step 4: Simplify right side
    290.12x = 99,283.42
  5. Step 5: Solve for x
    x = 99,283.42/290.12
  6. Step 6: Final answer
    x = 342.22

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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.