Home / 1,381.29-2,071.69-394.03

Finding the Fourth Proportional to 1,381.29, 2,071.69 and 394.03

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Solution

The fourth proportional to 1,381.29, 2,071.69 and 394.03 is: 590.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.29 : 2,071.69 = 394.03 : x
  2. Step 2: Convert to fraction form
    1,381.29/2,071.69 = 394.03/x
  3. Step 3: Cross multiply
    1,381.29x = 2,071.69 × 394.03
  4. Step 4: Simplify right side
    1,381.29x = 816,308.01
  5. Step 5: Solve for x
    x = 816,308.01/1,381.29
  6. Step 6: Final answer
    x = 590.98

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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.