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Finding the Fourth Proportional to 455.41, 629.23 and 439.01

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Solution

The fourth proportional to 455.41, 629.23 and 439.01 is: 606.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.41 : 629.23 = 439.01 : x
  2. Step 2: Convert to fraction form
    455.41/629.23 = 439.01/x
  3. Step 3: Cross multiply
    455.41x = 629.23 × 439.01
  4. Step 4: Simplify right side
    455.41x = 276,238.26
  5. Step 5: Solve for x
    x = 276,238.26/455.41
  6. Step 6: Final answer
    x = 606.57

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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.