Home / 3,077.58-4,247.08-1,680.32

Finding the Fourth Proportional to 3,077.58, 4,247.08 and 1,680.32

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Solution

The fourth proportional to 3,077.58, 4,247.08 and 1,680.32 is: 2,318.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,077.58 : 4,247.08 = 1,680.32 : x
  2. Step 2: Convert to fraction form
    3,077.58/4,247.08 = 1,680.32/x
  3. Step 3: Cross multiply
    3,077.58x = 4,247.08 × 1,680.32
  4. Step 4: Simplify right side
    3,077.58x = 7,136,453.47
  5. Step 5: Solve for x
    x = 7,136,453.47/3,077.58
  6. Step 6: Final answer
    x = 2,318.85

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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.