Home / 1,400.60-2,100.66-426.47

Finding the Fourth Proportional to 1,400.60, 2,100.66 and 426.47

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Solution

The fourth proportional to 1,400.60, 2,100.66 and 426.47 is: 639.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.60 : 2,100.66 = 426.47 : x
  2. Step 2: Convert to fraction form
    1,400.60/2,100.66 = 426.47/x
  3. Step 3: Cross multiply
    1,400.60x = 2,100.66 × 426.47
  4. Step 4: Simplify right side
    1,400.60x = 895,857.97
  5. Step 5: Solve for x
    x = 895,857.97/1,400.60
  6. Step 6: Final answer
    x = 639.63

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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.