Home / 2,156.16-3,234.25-857.63

Finding the Fourth Proportional to 2,156.16, 3,234.25 and 857.63

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Solution

The fourth proportional to 2,156.16, 3,234.25 and 857.63 is: 1,286.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.16 : 3,234.25 = 857.63 : x
  2. Step 2: Convert to fraction form
    2,156.16/3,234.25 = 857.63/x
  3. Step 3: Cross multiply
    2,156.16x = 3,234.25 × 857.63
  4. Step 4: Simplify right side
    2,156.16x = 2,773,789.83
  5. Step 5: Solve for x
    x = 2,773,789.83/2,156.16
  6. Step 6: Final answer
    x = 1,286.45

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1.5x scale

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.