Home / 1,319.21-1,818.14-1,003.78

Finding the Fourth Proportional to 1,319.21, 1,818.14 and 1,003.78

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Solution

The fourth proportional to 1,319.21, 1,818.14 and 1,003.78 is: 1,383.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.21 : 1,818.14 = 1,003.78 : x
  2. Step 2: Convert to fraction form
    1,319.21/1,818.14 = 1,003.78/x
  3. Step 3: Cross multiply
    1,319.21x = 1,818.14 × 1,003.78
  4. Step 4: Simplify right side
    1,319.21x = 1,825,012.57
  5. Step 5: Solve for x
    x = 1,825,012.57/1,319.21
  6. Step 6: Final answer
    x = 1,383.41

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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.