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Finding the Fourth Proportional to 189.98, 283.55 and 165.54

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Solution

The fourth proportional to 189.98, 283.55 and 165.54 is: 247.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.98 : 283.55 = 165.54 : x
  2. Step 2: Convert to fraction form
    189.98/283.55 = 165.54/x
  3. Step 3: Cross multiply
    189.98x = 283.55 × 165.54
  4. Step 4: Simplify right side
    189.98x = 46,938.04
  5. Step 5: Solve for x
    x = 46,938.04/189.98
  6. Step 6: Final answer
    x = 247.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.