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Finding the Fourth Proportional to 375.68, 518.47 and 287.01

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Solution

The fourth proportional to 375.68, 518.47 and 287.01 is: 396.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.68 : 518.47 = 287.01 : x
  2. Step 2: Convert to fraction form
    375.68/518.47 = 287.01/x
  3. Step 3: Cross multiply
    375.68x = 518.47 × 287.01
  4. Step 4: Simplify right side
    375.68x = 148,805.36
  5. Step 5: Solve for x
    x = 148,805.36/375.68
  6. Step 6: Final answer
    x = 396.09

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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.