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Finding the Fourth Proportional to 375.91, 518.93 and 288.97

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Solution

The fourth proportional to 375.91, 518.93 and 288.97 is: 398.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.91 : 518.93 = 288.97 : x
  2. Step 2: Convert to fraction form
    375.91/518.93 = 288.97/x
  3. Step 3: Cross multiply
    375.91x = 518.93 × 288.97
  4. Step 4: Simplify right side
    375.91x = 149,955.20
  5. Step 5: Solve for x
    x = 149,955.20/375.91
  6. Step 6: Final answer
    x = 398.91

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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.