Home / 2,172.28-2,997.70-1,177.55

Finding the Fourth Proportional to 2,172.28, 2,997.70 and 1,177.55

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Solution

The fourth proportional to 2,172.28, 2,997.70 and 1,177.55 is: 1,624.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.28 : 2,997.70 = 1,177.55 : x
  2. Step 2: Convert to fraction form
    2,172.28/2,997.70 = 1,177.55/x
  3. Step 3: Cross multiply
    2,172.28x = 2,997.70 × 1,177.55
  4. Step 4: Simplify right side
    2,172.28x = 3,529,941.64
  5. Step 5: Solve for x
    x = 3,529,941.64/2,172.28
  6. Step 6: Final answer
    x = 1,624.99

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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.