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Finding the Fourth Proportional to 319.98, 441.58 and 189.02

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Solution

The fourth proportional to 319.98, 441.58 and 189.02 is: 260.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.98 : 441.58 = 189.02 : x
  2. Step 2: Convert to fraction form
    319.98/441.58 = 189.02/x
  3. Step 3: Cross multiply
    319.98x = 441.58 × 189.02
  4. Step 4: Simplify right side
    319.98x = 83,467.45
  5. Step 5: Solve for x
    x = 83,467.45/319.98
  6. Step 6: Final answer
    x = 260.85

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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.