Home / 1,400.20-2,100.58-426.26

Finding the Fourth Proportional to 1,400.20, 2,100.58 and 426.26

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Solution

The fourth proportional to 1,400.20, 2,100.58 and 426.26 is: 639.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.20 : 2,100.58 = 426.26 : x
  2. Step 2: Convert to fraction form
    1,400.20/2,100.58 = 426.26/x
  3. Step 3: Cross multiply
    1,400.20x = 2,100.58 × 426.26
  4. Step 4: Simplify right side
    1,400.20x = 895,393.23
  5. Step 5: Solve for x
    x = 895,393.23/1,400.20
  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.