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Finding the Fourth Proportional to 454.84, 625.26 and 391.59

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Solution

The fourth proportional to 454.84, 625.26 and 391.59 is: 538.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.84 : 625.26 = 391.59 : x
  2. Step 2: Convert to fraction form
    454.84/625.26 = 391.59/x
  3. Step 3: Cross multiply
    454.84x = 625.26 × 391.59
  4. Step 4: Simplify right side
    454.84x = 244,845.56
  5. Step 5: Solve for x
    x = 244,845.56/454.84
  6. Step 6: Final answer
    x = 538.31

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.