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Finding the Fourth Proportional to 290.43, 399.65 and 268.07

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Solution

The fourth proportional to 290.43, 399.65 and 268.07 is: 368.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.43 : 399.65 = 268.07 : x
  2. Step 2: Convert to fraction form
    290.43/399.65 = 268.07/x
  3. Step 3: Cross multiply
    290.43x = 399.65 × 268.07
  4. Step 4: Simplify right side
    290.43x = 107,130.84
  5. Step 5: Solve for x
    x = 107,130.84/290.43
  6. Step 6: Final answer
    x = 368.87

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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.