Home / 3,077.80-4,247.13-1,680.55

Finding the Fourth Proportional to 3,077.80, 4,247.13 and 1,680.55

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Solution

The fourth proportional to 3,077.80, 4,247.13 and 1,680.55 is: 2,319.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,077.80 : 4,247.13 = 1,680.55 : x
  2. Step 2: Convert to fraction form
    3,077.80/4,247.13 = 1,680.55/x
  3. Step 3: Cross multiply
    3,077.80x = 4,247.13 × 1,680.55
  4. Step 4: Simplify right side
    3,077.80x = 7,137,514.32
  5. Step 5: Solve for x
    x = 7,137,514.32/3,077.80
  6. Step 6: Final answer
    x = 2,319.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.