Home / 3,128.80-4,693.26-1,397.08

Finding the Fourth Proportional to 3,128.80, 4,693.26 and 1,397.08

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Solution

The fourth proportional to 3,128.80, 4,693.26 and 1,397.08 is: 2,095.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.80 : 4,693.26 = 1,397.08 : x
  2. Step 2: Convert to fraction form
    3,128.80/4,693.26 = 1,397.08/x
  3. Step 3: Cross multiply
    3,128.80x = 4,693.26 × 1,397.08
  4. Step 4: Simplify right side
    3,128.80x = 6,556,859.68
  5. Step 5: Solve for x
    x = 6,556,859.68/3,128.80
  6. Step 6: Final answer
    x = 2,095.65

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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.