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Finding the Fourth Proportional to 453.30, 625.28 and 287.39

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Solution

The fourth proportional to 453.30, 625.28 and 287.39 is: 396.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.30 : 625.28 = 287.39 : x
  2. Step 2: Convert to fraction form
    453.30/625.28 = 287.39/x
  3. Step 3: Cross multiply
    453.30x = 625.28 × 287.39
  4. Step 4: Simplify right side
    453.30x = 179,699.22
  5. Step 5: Solve for x
    x = 179,699.22/453.30
  6. Step 6: Final answer
    x = 396.42

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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.