Home / 2,851.80-4,279.07-1,390.16

Finding the Fourth Proportional to 2,851.80, 4,279.07 and 1,390.16

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Solution

The fourth proportional to 2,851.80, 4,279.07 and 1,390.16 is: 2,085.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,851.80 : 4,279.07 = 1,390.16 : x
  2. Step 2: Convert to fraction form
    2,851.80/4,279.07 = 1,390.16/x
  3. Step 3: Cross multiply
    2,851.80x = 4,279.07 × 1,390.16
  4. Step 4: Simplify right side
    2,851.80x = 5,948,570.56
  5. Step 5: Solve for x
    x = 5,948,570.56/2,851.80
  6. Step 6: Final answer
    x = 2,085.90

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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.