Home / 1,515.19-2,090.37-851.89

Finding the Fourth Proportional to 1,515.19, 2,090.37 and 851.89

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Solution

The fourth proportional to 1,515.19, 2,090.37 and 851.89 is: 1,175.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.19 : 2,090.37 = 851.89 : x
  2. Step 2: Convert to fraction form
    1,515.19/2,090.37 = 851.89/x
  3. Step 3: Cross multiply
    1,515.19x = 2,090.37 × 851.89
  4. Step 4: Simplify right side
    1,515.19x = 1,780,765.30
  5. Step 5: Solve for x
    x = 1,780,765.30/1,515.19
  6. Step 6: Final answer
    x = 1,175.28

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.