Home / 1,987.79-2,743.40-1,201.83

Finding the Fourth Proportional to 1,987.79, 2,743.40 and 1,201.83

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Solution

The fourth proportional to 1,987.79, 2,743.40 and 1,201.83 is: 1,658.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.79 : 2,743.40 = 1,201.83 : x
  2. Step 2: Convert to fraction form
    1,987.79/2,743.40 = 1,201.83/x
  3. Step 3: Cross multiply
    1,987.79x = 2,743.40 × 1,201.83
  4. Step 4: Simplify right side
    1,987.79x = 3,297,094.41
  5. Step 5: Solve for x
    x = 3,297,094.41/1,987.79
  6. Step 6: Final answer
    x = 1,658.68

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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.