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Finding the Fourth Proportional to 301.14, 415.47 and 189.06

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Solution

The fourth proportional to 301.14, 415.47 and 189.06 is: 260.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.14 : 415.47 = 189.06 : x
  2. Step 2: Convert to fraction form
    301.14/415.47 = 189.06/x
  3. Step 3: Cross multiply
    301.14x = 415.47 × 189.06
  4. Step 4: Simplify right side
    301.14x = 78,548.76
  5. Step 5: Solve for x
    x = 78,548.76/301.14
  6. Step 6: Final answer
    x = 260.84

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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.