Home / 1,412.13-2,118.26-386.13

Finding the Fourth Proportional to 1,412.13, 2,118.26 and 386.13

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Solution

The fourth proportional to 1,412.13, 2,118.26 and 386.13 is: 579.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.13 : 2,118.26 = 386.13 : x
  2. Step 2: Convert to fraction form
    1,412.13/2,118.26 = 386.13/x
  3. Step 3: Cross multiply
    1,412.13x = 2,118.26 × 386.13
  4. Step 4: Simplify right side
    1,412.13x = 817,923.73
  5. Step 5: Solve for x
    x = 817,923.73/1,412.13
  6. Step 6: Final answer
    x = 579.21

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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.