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Finding the Fourth Proportional to 2,155, 3,234.12 and 1,727.32

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Solution

The fourth proportional to 2,155, 3,234.12 and 1,727.32 is: 2,592.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155 : 3,234.12 = 1,727.32 : x
  2. Step 2: Convert to fraction form
    2,155/3,234.12 = 1,727.32/x
  3. Step 3: Cross multiply
    2,155x = 3,234.12 × 1,727.32
  4. Step 4: Simplify right side
    2,155x = 5,586,360.16
  5. Step 5: Solve for x
    x = 5,586,360.16/2,155
  6. Step 6: Final answer
    x = 2,592.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.