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Finding the Fourth Proportional to 281.94, 389.14 and 188.84

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Solution

The fourth proportional to 281.94, 389.14 and 188.84 is: 260.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.94 : 389.14 = 188.84 : x
  2. Step 2: Convert to fraction form
    281.94/389.14 = 188.84/x
  3. Step 3: Cross multiply
    281.94x = 389.14 × 188.84
  4. Step 4: Simplify right side
    281.94x = 73,485.20
  5. Step 5: Solve for x
    x = 73,485.20/281.94
  6. Step 6: Final answer
    x = 260.64

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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.