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Finding the Fourth Proportional to 382, 573.40 and 208.80

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Solution

The fourth proportional to 382, 573.40 and 208.80 is: 313.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    382 : 573.40 = 208.80 : x
  2. Step 2: Convert to fraction form
    382/573.40 = 208.80/x
  3. Step 3: Cross multiply
    382x = 573.40 × 208.80
  4. Step 4: Simplify right side
    382x = 119,725.92
  5. Step 5: Solve for x
    x = 119,725.92/382
  6. Step 6: Final answer
    x = 313.42

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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.