Home / 3,421.89-5,134.22-1,230.78

Finding the Fourth Proportional to 3,421.89, 5,134.22 and 1,230.78

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Solution

The fourth proportional to 3,421.89, 5,134.22 and 1,230.78 is: 1,846.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.89 : 5,134.22 = 1,230.78 : x
  2. Step 2: Convert to fraction form
    3,421.89/5,134.22 = 1,230.78/x
  3. Step 3: Cross multiply
    3,421.89x = 5,134.22 × 1,230.78
  4. Step 4: Simplify right side
    3,421.89x = 6,319,108.13
  5. Step 5: Solve for x
    x = 6,319,108.13/3,421.89
  6. Step 6: Final answer
    x = 1,846.67

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1.5x scale

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.