Home / 3,620.63-5,431.48-1,312.67

Finding the Fourth Proportional to 3,620.63, 5,431.48 and 1,312.67

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Solution

The fourth proportional to 3,620.63, 5,431.48 and 1,312.67 is: 1,969.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.63 : 5,431.48 = 1,312.67 : x
  2. Step 2: Convert to fraction form
    3,620.63/5,431.48 = 1,312.67/x
  3. Step 3: Cross multiply
    3,620.63x = 5,431.48 × 1,312.67
  4. Step 4: Simplify right side
    3,620.63x = 7,129,710.41
  5. Step 5: Solve for x
    x = 7,129,710.41/3,620.63
  6. Step 6: Final answer
    x = 1,969.19

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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.