Home / 3,385.21-5,077.13-920.21

Finding the Fourth Proportional to 3,385.21, 5,077.13 and 920.21

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Solution

The fourth proportional to 3,385.21, 5,077.13 and 920.21 is: 1,380.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,385.21 : 5,077.13 = 920.21 : x
  2. Step 2: Convert to fraction form
    3,385.21/5,077.13 = 920.21/x
  3. Step 3: Cross multiply
    3,385.21x = 5,077.13 × 920.21
  4. Step 4: Simplify right side
    3,385.21x = 4,672,025.80
  5. Step 5: Solve for x
    x = 4,672,025.80/3,385.21
  6. Step 6: Final answer
    x = 1,380.13

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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.