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Finding the Fourth Proportional to 444.48, 613.28 and 257.87

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Solution

The fourth proportional to 444.48, 613.28 and 257.87 is: 355.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.48 : 613.28 = 257.87 : x
  2. Step 2: Convert to fraction form
    444.48/613.28 = 257.87/x
  3. Step 3: Cross multiply
    444.48x = 613.28 × 257.87
  4. Step 4: Simplify right side
    444.48x = 158,144.09
  5. Step 5: Solve for x
    x = 158,144.09/444.48
  6. Step 6: Final answer
    x = 355.79

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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.