Home / 2,128.66-3,192.82-1,307.04

Finding the Fourth Proportional to 2,128.66, 3,192.82 and 1,307.04

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Solution

The fourth proportional to 2,128.66, 3,192.82 and 1,307.04 is: 1,960.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.66 : 3,192.82 = 1,307.04 : x
  2. Step 2: Convert to fraction form
    2,128.66/3,192.82 = 1,307.04/x
  3. Step 3: Cross multiply
    2,128.66x = 3,192.82 × 1,307.04
  4. Step 4: Simplify right side
    2,128.66x = 4,173,143.45
  5. Step 5: Solve for x
    x = 4,173,143.45/2,128.66
  6. Step 6: Final answer
    x = 1,960.46

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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.