Home / 1,247.37-1,711.13-1,172.85

Finding the Fourth Proportional to 1,247.37, 1,711.13 and 1,172.85

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Solution

The fourth proportional to 1,247.37, 1,711.13 and 1,172.85 is: 1,608.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.37 : 1,711.13 = 1,172.85 : x
  2. Step 2: Convert to fraction form
    1,247.37/1,711.13 = 1,172.85/x
  3. Step 3: Cross multiply
    1,247.37x = 1,711.13 × 1,172.85
  4. Step 4: Simplify right side
    1,247.37x = 2,006,892.96
  5. Step 5: Solve for x
    x = 2,006,892.96/1,247.37
  6. Step 6: Final answer
    x = 1,608.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.