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Finding the Fourth Proportional to 188.64, 260.40 and 133.56

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Solution

The fourth proportional to 188.64, 260.40 and 133.56 is: 184.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.64 : 260.40 = 133.56 : x
  2. Step 2: Convert to fraction form
    188.64/260.40 = 133.56/x
  3. Step 3: Cross multiply
    188.64x = 260.40 × 133.56
  4. Step 4: Simplify right side
    188.64x = 34,779.02
  5. Step 5: Solve for x
    x = 34,779.02/188.64
  6. Step 6: Final answer
    x = 184.37

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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.