Home / 1,400.15-2,100.33-426.33

Finding the Fourth Proportional to 1,400.15, 2,100.33 and 426.33

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Solution

The fourth proportional to 1,400.15, 2,100.33 and 426.33 is: 639.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.15 : 2,100.33 = 426.33 : x
  2. Step 2: Convert to fraction form
    1,400.15/2,100.33 = 426.33/x
  3. Step 3: Cross multiply
    1,400.15x = 2,100.33 × 426.33
  4. Step 4: Simplify right side
    1,400.15x = 895,433.69
  5. Step 5: Solve for x
    x = 895,433.69/1,400.15
  6. Step 6: Final answer
    x = 639.53

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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.