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Finding the Fourth Proportional to 300.78, 453.47 and 247.32

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Solution

The fourth proportional to 300.78, 453.47 and 247.32 is: 372.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.78 : 453.47 = 247.32 : x
  2. Step 2: Convert to fraction form
    300.78/453.47 = 247.32/x
  3. Step 3: Cross multiply
    300.78x = 453.47 × 247.32
  4. Step 4: Simplify right side
    300.78x = 112,150.96
  5. Step 5: Solve for x
    x = 112,150.96/300.78
  6. Step 6: Final answer
    x = 372.87

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.