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Finding the Fourth Proportional to 582.44, 873.74 and 257.78

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Solution

The fourth proportional to 582.44, 873.74 and 257.78 is: 386.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.44 : 873.74 = 257.78 : x
  2. Step 2: Convert to fraction form
    582.44/873.74 = 257.78/x
  3. Step 3: Cross multiply
    582.44x = 873.74 × 257.78
  4. Step 4: Simplify right side
    582.44x = 225,232.70
  5. Step 5: Solve for x
    x = 225,232.70/582.44
  6. Step 6: Final answer
    x = 386.71

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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.