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Finding the Fourth Proportional to 260.50, 390.86 and 116.18

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Solution

The fourth proportional to 260.50, 390.86 and 116.18 is: 174.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.50 : 390.86 = 116.18 : x
  2. Step 2: Convert to fraction form
    260.50/390.86 = 116.18/x
  3. Step 3: Cross multiply
    260.50x = 390.86 × 116.18
  4. Step 4: Simplify right side
    260.50x = 45,410.11
  5. Step 5: Solve for x
    x = 45,410.11/260.50
  6. Step 6: Final answer
    x = 174.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.