Home / 2,156.36-3,234.90-857.92

Finding the Fourth Proportional to 2,156.36, 3,234.90 and 857.92

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Solution

The fourth proportional to 2,156.36, 3,234.90 and 857.92 is: 1,287.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.36 : 3,234.90 = 857.92 : x
  2. Step 2: Convert to fraction form
    2,156.36/3,234.90 = 857.92/x
  3. Step 3: Cross multiply
    2,156.36x = 3,234.90 × 857.92
  4. Step 4: Simplify right side
    2,156.36x = 2,775,285.41
  5. Step 5: Solve for x
    x = 2,775,285.41/2,156.36
  6. Step 6: Final answer
    x = 1,287.02

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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.