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Finding the Fourth Proportional to 300.42, 451.26 and 287.10

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Solution

The fourth proportional to 300.42, 451.26 and 287.10 is: 431.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.42 : 451.26 = 287.10 : x
  2. Step 2: Convert to fraction form
    300.42/451.26 = 287.10/x
  3. Step 3: Cross multiply
    300.42x = 451.26 × 287.10
  4. Step 4: Simplify right side
    300.42x = 129,556.75
  5. Step 5: Solve for x
    x = 129,556.75/300.42
  6. Step 6: Final answer
    x = 431.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.