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Finding the Fourth Proportional to 260.06, 390.18 and 187.13

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Solution

The fourth proportional to 260.06, 390.18 and 187.13 is: 280.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.06 : 390.18 = 187.13 : x
  2. Step 2: Convert to fraction form
    260.06/390.18 = 187.13/x
  3. Step 3: Cross multiply
    260.06x = 390.18 × 187.13
  4. Step 4: Simplify right side
    260.06x = 73,014.38
  5. Step 5: Solve for x
    x = 73,014.38/260.06
  6. Step 6: Final answer
    x = 280.76

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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.