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Finding the Fourth Proportional to 453.51, 625.60 and 287.43

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Solution

The fourth proportional to 453.51, 625.60 and 287.43 is: 396.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.51 : 625.60 = 287.43 : x
  2. Step 2: Convert to fraction form
    453.51/625.60 = 287.43/x
  3. Step 3: Cross multiply
    453.51x = 625.60 × 287.43
  4. Step 4: Simplify right side
    453.51x = 179,816.21
  5. Step 5: Solve for x
    x = 179,816.21/453.51
  6. Step 6: Final answer
    x = 396.50

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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.