Home / 2,155.65-3,234.70-839.23

Finding the Fourth Proportional to 2,155.65, 3,234.70 and 839.23

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Solution

The fourth proportional to 2,155.65, 3,234.70 and 839.23 is: 1,259.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.65 : 3,234.70 = 839.23 : x
  2. Step 2: Convert to fraction form
    2,155.65/3,234.70 = 839.23/x
  3. Step 3: Cross multiply
    2,155.65x = 3,234.70 × 839.23
  4. Step 4: Simplify right side
    2,155.65x = 2,714,670.40
  5. Step 5: Solve for x
    x = 2,714,670.40/2,155.65
  6. Step 6: Final answer
    x = 1,259.33

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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.