Home / 1,394.16-2,090.58-420.06

Finding the Fourth Proportional to 1,394.16, 2,090.58 and 420.06

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Solution

The fourth proportional to 1,394.16, 2,090.58 and 420.06 is: 629.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.16 : 2,090.58 = 420.06 : x
  2. Step 2: Convert to fraction form
    1,394.16/2,090.58 = 420.06/x
  3. Step 3: Cross multiply
    1,394.16x = 2,090.58 × 420.06
  4. Step 4: Simplify right side
    1,394.16x = 878,169.03
  5. Step 5: Solve for x
    x = 878,169.03/1,394.16
  6. Step 6: Final answer
    x = 629.89

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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.