Home / 5,078.82-7,617.20-1,381.30

Finding the Fourth Proportional to 5,078.82, 7,617.20 and 1,381.30

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Solution

The fourth proportional to 5,078.82, 7,617.20 and 1,381.30 is: 2,071.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.82 : 7,617.20 = 1,381.30 : x
  2. Step 2: Convert to fraction form
    5,078.82/7,617.20 = 1,381.30/x
  3. Step 3: Cross multiply
    5,078.82x = 7,617.20 × 1,381.30
  4. Step 4: Simplify right side
    5,078.82x = 10,521,638.36
  5. Step 5: Solve for x
    x = 10,521,638.36/5,078.82
  6. Step 6: Final answer
    x = 2,071.67

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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.