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Finding the Fourth Proportional to 375.28, 518.40 and 293.42

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Solution

The fourth proportional to 375.28, 518.40 and 293.42 is: 405.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.28 : 518.40 = 293.42 : x
  2. Step 2: Convert to fraction form
    375.28/518.40 = 293.42/x
  3. Step 3: Cross multiply
    375.28x = 518.40 × 293.42
  4. Step 4: Simplify right side
    375.28x = 152,110.22
  5. Step 5: Solve for x
    x = 152,110.22/375.28
  6. Step 6: Final answer
    x = 405.32

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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.