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Finding the Fourth Proportional to 2,156.92, 3,235.38 and 617.92

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Solution

The fourth proportional to 2,156.92, 3,235.38 and 617.92 is: 926.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.92 : 3,235.38 = 617.92 : x
  2. Step 2: Convert to fraction form
    2,156.92/3,235.38 = 617.92/x
  3. Step 3: Cross multiply
    2,156.92x = 3,235.38 × 617.92
  4. Step 4: Simplify right side
    2,156.92x = 1,999,206.01
  5. Step 5: Solve for x
    x = 1,999,206.01/2,156.92
  6. Step 6: Final answer
    x = 926.88

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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.