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Finding the Fourth Proportional to 257.95, 384.79 and 229.41

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Solution

The fourth proportional to 257.95, 384.79 and 229.41 is: 342.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.95 : 384.79 = 229.41 : x
  2. Step 2: Convert to fraction form
    257.95/384.79 = 229.41/x
  3. Step 3: Cross multiply
    257.95x = 384.79 × 229.41
  4. Step 4: Simplify right side
    257.95x = 88,274.67
  5. Step 5: Solve for x
    x = 88,274.67/257.95
  6. Step 6: Final answer
    x = 342.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.