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Finding the Fourth Proportional to 2,173.72, 2,999.72 and 1,178.97

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Solution

The fourth proportional to 2,173.72, 2,999.72 and 1,178.97 is: 1,626.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,173.72 : 2,999.72 = 1,178.97 : x
  2. Step 2: Convert to fraction form
    2,173.72/2,999.72 = 1,178.97/x
  3. Step 3: Cross multiply
    2,173.72x = 2,999.72 × 1,178.97
  4. Step 4: Simplify right side
    2,173.72x = 3,536,573.99
  5. Step 5: Solve for x
    x = 3,536,573.99/2,173.72
  6. Step 6: Final answer
    x = 1,626.97

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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.