Home / 1,419.58-2,129.04-445.45

Finding the Fourth Proportional to 1,419.58, 2,129.04 and 445.45

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Solution

The fourth proportional to 1,419.58, 2,129.04 and 445.45 is: 668.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.58 : 2,129.04 = 445.45 : x
  2. Step 2: Convert to fraction form
    1,419.58/2,129.04 = 445.45/x
  3. Step 3: Cross multiply
    1,419.58x = 2,129.04 × 445.45
  4. Step 4: Simplify right side
    1,419.58x = 948,370.22
  5. Step 5: Solve for x
    x = 948,370.22/1,419.58
  6. Step 6: Final answer
    x = 668.07

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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.