Home / 1,426.04-2,138.80-386.06

Finding the Fourth Proportional to 1,426.04, 2,138.80 and 386.06

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Solution

The fourth proportional to 1,426.04, 2,138.80 and 386.06 is: 579.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.04 : 2,138.80 = 386.06 : x
  2. Step 2: Convert to fraction form
    1,426.04/2,138.80 = 386.06/x
  3. Step 3: Cross multiply
    1,426.04x = 2,138.80 × 386.06
  4. Step 4: Simplify right side
    1,426.04x = 825,705.13
  5. Step 5: Solve for x
    x = 825,705.13/1,426.04
  6. Step 6: Final answer
    x = 579.02

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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.