Home / 1,419.38-2,129.09-393.38

Finding the Fourth Proportional to 1,419.38, 2,129.09 and 393.38

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Solution

The fourth proportional to 1,419.38, 2,129.09 and 393.38 is: 590.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.38 : 2,129.09 = 393.38 : x
  2. Step 2: Convert to fraction form
    1,419.38/2,129.09 = 393.38/x
  3. Step 3: Cross multiply
    1,419.38x = 2,129.09 × 393.38
  4. Step 4: Simplify right side
    1,419.38x = 837,528.81
  5. Step 5: Solve for x
    x = 837,528.81/1,419.38
  6. Step 6: Final answer
    x = 590.07

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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.