Home / 920.03-1,380.38-426.67

Finding the Fourth Proportional to 920.03, 1,380.38 and 426.67

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Solution

The fourth proportional to 920.03, 1,380.38 and 426.67 is: 640.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.03 : 1,380.38 = 426.67 : x
  2. Step 2: Convert to fraction form
    920.03/1,380.38 = 426.67/x
  3. Step 3: Cross multiply
    920.03x = 1,380.38 × 426.67
  4. Step 4: Simplify right side
    920.03x = 588,966.73
  5. Step 5: Solve for x
    x = 588,966.73/920.03
  6. Step 6: Final answer
    x = 640.16

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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.