Home / 1,419.23-2,129.18-445.34

Finding the Fourth Proportional to 1,419.23, 2,129.18 and 445.34

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Solution

The fourth proportional to 1,419.23, 2,129.18 and 445.34 is: 668.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.23 : 2,129.18 = 445.34 : x
  2. Step 2: Convert to fraction form
    1,419.23/2,129.18 = 445.34/x
  3. Step 3: Cross multiply
    1,419.23x = 2,129.18 × 445.34
  4. Step 4: Simplify right side
    1,419.23x = 948,196.15
  5. Step 5: Solve for x
    x = 948,196.15/1,419.23
  6. Step 6: Final answer
    x = 668.11

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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.