Home / 1,419.59-2,129.75-445.70

Finding the Fourth Proportional to 1,419.59, 2,129.75 and 445.70

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Solution

The fourth proportional to 1,419.59, 2,129.75 and 445.70 is: 668.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.59 : 2,129.75 = 445.70 : x
  2. Step 2: Convert to fraction form
    1,419.59/2,129.75 = 445.70/x
  3. Step 3: Cross multiply
    1,419.59x = 2,129.75 × 445.70
  4. Step 4: Simplify right side
    1,419.59x = 949,229.58
  5. Step 5: Solve for x
    x = 949,229.58/1,419.59
  6. Step 6: Final answer
    x = 668.66

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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.