Home / 1,400.41-2,100.72-427.19

Finding the Fourth Proportional to 1,400.41, 2,100.72 and 427.19

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Solution

The fourth proportional to 1,400.41, 2,100.72 and 427.19 is: 640.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.41 : 2,100.72 = 427.19 : x
  2. Step 2: Convert to fraction form
    1,400.41/2,100.72 = 427.19/x
  3. Step 3: Cross multiply
    1,400.41x = 2,100.72 × 427.19
  4. Step 4: Simplify right side
    1,400.41x = 897,406.58
  5. Step 5: Solve for x
    x = 897,406.58/1,400.41
  6. Step 6: Final answer
    x = 640.82

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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.