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Finding the Fourth Proportional to 3,581.58, 5,373.72 and 1,390.44

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Solution

The fourth proportional to 3,581.58, 5,373.72 and 1,390.44 is: 2,086.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,581.58 : 5,373.72 = 1,390.44 : x
  2. Step 2: Convert to fraction form
    3,581.58/5,373.72 = 1,390.44/x
  3. Step 3: Cross multiply
    3,581.58x = 5,373.72 × 1,390.44
  4. Step 4: Simplify right side
    3,581.58x = 7,471,835.24
  5. Step 5: Solve for x
    x = 7,471,835.24/3,581.58
  6. Step 6: Final answer
    x = 2,086.18

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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.