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Finding the Fourth Proportional to 189.60, 265.60 and 189.60

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Solution

The fourth proportional to 189.60, 265.60 and 189.60 is: 265.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.60 : 265.60 = 189.60 : x
  2. Step 2: Convert to fraction form
    189.60/265.60 = 189.60/x
  3. Step 3: Cross multiply
    189.60x = 265.60 × 189.60
  4. Step 4: Simplify right side
    189.60x = 50,357.76
  5. Step 5: Solve for x
    x = 50,357.76/189.60
  6. Step 6: Final answer
    x = 265.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.