Home / 1,419.14-2,128.61-445.22

Finding the Fourth Proportional to 1,419.14, 2,128.61 and 445.22

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Solution

The fourth proportional to 1,419.14, 2,128.61 and 445.22 is: 667.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.14 : 2,128.61 = 445.22 : x
  2. Step 2: Convert to fraction form
    1,419.14/2,128.61 = 445.22/x
  3. Step 3: Cross multiply
    1,419.14x = 2,128.61 × 445.22
  4. Step 4: Simplify right side
    1,419.14x = 947,702.84
  5. Step 5: Solve for x
    x = 947,702.84/1,419.14
  6. Step 6: Final answer
    x = 667.80

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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.