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Finding the Fourth Proportional to 483.63, 726.26 and 431.66

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Solution

The fourth proportional to 483.63, 726.26 and 431.66 is: 648.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.63 : 726.26 = 431.66 : x
  2. Step 2: Convert to fraction form
    483.63/726.26 = 431.66/x
  3. Step 3: Cross multiply
    483.63x = 726.26 × 431.66
  4. Step 4: Simplify right side
    483.63x = 313,491.60
  5. Step 5: Solve for x
    x = 313,491.60/483.63
  6. Step 6: Final answer
    x = 648.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.