Home / 3,077.88-4,247.48-1,680.64

Finding the Fourth Proportional to 3,077.88, 4,247.48 and 1,680.64

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Solution

The fourth proportional to 3,077.88, 4,247.48 and 1,680.64 is: 2,319.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,077.88 : 4,247.48 = 1,680.64 : x
  2. Step 2: Convert to fraction form
    3,077.88/4,247.48 = 1,680.64/x
  3. Step 3: Cross multiply
    3,077.88x = 4,247.48 × 1,680.64
  4. Step 4: Simplify right side
    3,077.88x = 7,138,484.79
  5. Step 5: Solve for x
    x = 7,138,484.79/3,077.88
  6. Step 6: Final answer
    x = 2,319.29

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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.