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Finding the Fourth Proportional to 453.99, 629.54 and 438.60

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Solution

The fourth proportional to 453.99, 629.54 and 438.60 is: 608.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.99 : 629.54 = 438.60 : x
  2. Step 2: Convert to fraction form
    453.99/629.54 = 438.60/x
  3. Step 3: Cross multiply
    453.99x = 629.54 × 438.60
  4. Step 4: Simplify right side
    453.99x = 276,114.05
  5. Step 5: Solve for x
    x = 276,114.05/453.99
  6. Step 6: Final answer
    x = 608.19

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.