Home / 1,240.38-1,690.20-1,236.06

Finding the Fourth Proportional to 1,240.38, 1,690.20 and 1,236.06

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Solution

The fourth proportional to 1,240.38, 1,690.20 and 1,236.06 is: 1,684.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.38 : 1,690.20 = 1,236.06 : x
  2. Step 2: Convert to fraction form
    1,240.38/1,690.20 = 1,236.06/x
  3. Step 3: Cross multiply
    1,240.38x = 1,690.20 × 1,236.06
  4. Step 4: Simplify right side
    1,240.38x = 2,089,188.61
  5. Step 5: Solve for x
    x = 2,089,188.61/1,240.38
  6. Step 6: Final answer
    x = 1,684.31

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.