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Finding the Fourth Proportional to 453.44, 679.07 and 388.07

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Solution

The fourth proportional to 453.44, 679.07 and 388.07 is: 581.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.44 : 679.07 = 388.07 : x
  2. Step 2: Convert to fraction form
    453.44/679.07 = 388.07/x
  3. Step 3: Cross multiply
    453.44x = 679.07 × 388.07
  4. Step 4: Simplify right side
    453.44x = 263,523.30
  5. Step 5: Solve for x
    x = 263,523.30/453.44
  6. Step 6: Final answer
    x = 581.17

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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.