Home / 2,114.80-3,170.26-815.29

Finding the Fourth Proportional to 2,114.80, 3,170.26 and 815.29

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Solution

The fourth proportional to 2,114.80, 3,170.26 and 815.29 is: 1,222.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,114.80 : 3,170.26 = 815.29 : x
  2. Step 2: Convert to fraction form
    2,114.80/3,170.26 = 815.29/x
  3. Step 3: Cross multiply
    2,114.80x = 3,170.26 × 815.29
  4. Step 4: Simplify right side
    2,114.80x = 2,584,681.28
  5. Step 5: Solve for x
    x = 2,584,681.28/2,114.80
  6. Step 6: Final answer
    x = 1,222.19

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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.