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Finding the Fourth Proportional to 2,174.31, 2,999.07 and 1,388.07

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Solution

The fourth proportional to 2,174.31, 2,999.07 and 1,388.07 is: 1,914.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.31 : 2,999.07 = 1,388.07 : x
  2. Step 2: Convert to fraction form
    2,174.31/2,999.07 = 1,388.07/x
  3. Step 3: Cross multiply
    2,174.31x = 2,999.07 × 1,388.07
  4. Step 4: Simplify right side
    2,174.31x = 4,162,919.09
  5. Step 5: Solve for x
    x = 4,162,919.09/2,174.31
  6. Step 6: Final answer
    x = 1,914.59

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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.