Home / 1,400.22-2,100.34-426.32

Finding the Fourth Proportional to 1,400.22, 2,100.34 and 426.32

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Solution

The fourth proportional to 1,400.22, 2,100.34 and 426.32 is: 639.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.22 : 2,100.34 = 426.32 : x
  2. Step 2: Convert to fraction form
    1,400.22/2,100.34 = 426.32/x
  3. Step 3: Cross multiply
    1,400.22x = 2,100.34 × 426.32
  4. Step 4: Simplify right side
    1,400.22x = 895,416.95
  5. Step 5: Solve for x
    x = 895,416.95/1,400.22
  6. Step 6: Final answer
    x = 639.48

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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.