Home / 3,077.50-4,247-1,680.25

Finding the Fourth Proportional to 3,077.50, 4,247 and 1,680.25

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Solution

The fourth proportional to 3,077.50, 4,247 and 1,680.25 is: 2,318.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,077.50 : 4,247 = 1,680.25 : x
  2. Step 2: Convert to fraction form
    3,077.50/4,247 = 1,680.25/x
  3. Step 3: Cross multiply
    3,077.50x = 4,247 × 1,680.25
  4. Step 4: Simplify right side
    3,077.50x = 7,136,021.75
  5. Step 5: Solve for x
    x = 7,136,021.75/3,077.50
  6. Step 6: Final answer
    x = 2,318.77

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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.