Home / 1,581.58-2,181.36-1,115.02

Finding the Fourth Proportional to 1,581.58, 2,181.36 and 1,115.02

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Solution

The fourth proportional to 1,581.58, 2,181.36 and 1,115.02 is: 1,537.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.58 : 2,181.36 = 1,115.02 : x
  2. Step 2: Convert to fraction form
    1,581.58/2,181.36 = 1,115.02/x
  3. Step 3: Cross multiply
    1,581.58x = 2,181.36 × 1,115.02
  4. Step 4: Simplify right side
    1,581.58x = 2,432,260.03
  5. Step 5: Solve for x
    x = 2,432,260.03/1,581.58
  6. Step 6: Final answer
    x = 1,537.87

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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.