Home / 2,084.90-3,128.21-914.29

Finding the Fourth Proportional to 2,084.90, 3,128.21 and 914.29

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Solution

The fourth proportional to 2,084.90, 3,128.21 and 914.29 is: 1,371.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,084.90 : 3,128.21 = 914.29 : x
  2. Step 2: Convert to fraction form
    2,084.90/3,128.21 = 914.29/x
  3. Step 3: Cross multiply
    2,084.90x = 3,128.21 × 914.29
  4. Step 4: Simplify right side
    2,084.90x = 2,860,082.16
  5. Step 5: Solve for x
    x = 2,860,082.16/2,084.90
  6. Step 6: Final answer
    x = 1,371.81

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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.