Home / 1,419.36-2,128.95-445.44

Finding the Fourth Proportional to 1,419.36, 2,128.95 and 445.44

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Solution

The fourth proportional to 1,419.36, 2,128.95 and 445.44 is: 668.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.36 : 2,128.95 = 445.44 : x
  2. Step 2: Convert to fraction form
    1,419.36/2,128.95 = 445.44/x
  3. Step 3: Cross multiply
    1,419.36x = 2,128.95 × 445.44
  4. Step 4: Simplify right side
    1,419.36x = 948,319.49
  5. Step 5: Solve for x
    x = 948,319.49/1,419.36
  6. Step 6: Final answer
    x = 668.13

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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.