Home / 1,288.51-1,933.74-1,211.96

Finding the Fourth Proportional to 1,288.51, 1,933.74 and 1,211.96

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Solution

The fourth proportional to 1,288.51, 1,933.74 and 1,211.96 is: 1,818.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.51 : 1,933.74 = 1,211.96 : x
  2. Step 2: Convert to fraction form
    1,288.51/1,933.74 = 1,211.96/x
  3. Step 3: Cross multiply
    1,288.51x = 1,933.74 × 1,211.96
  4. Step 4: Simplify right side
    1,288.51x = 2,343,620.36
  5. Step 5: Solve for x
    x = 2,343,620.36/1,288.51
  6. Step 6: Final answer
    x = 1,818.86

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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.