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Finding the Fourth Proportional to 189.03, 260.78 and 145.29

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Solution

The fourth proportional to 189.03, 260.78 and 145.29 is: 200.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.03 : 260.78 = 145.29 : x
  2. Step 2: Convert to fraction form
    189.03/260.78 = 145.29/x
  3. Step 3: Cross multiply
    189.03x = 260.78 × 145.29
  4. Step 4: Simplify right side
    189.03x = 37,888.73
  5. Step 5: Solve for x
    x = 37,888.73/189.03
  6. Step 6: Final answer
    x = 200.44

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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.