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Finding the Fourth Proportional to 2,155.16, 3,233.28 and 694.28

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Solution

The fourth proportional to 2,155.16, 3,233.28 and 694.28 is: 1,041.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.16 : 3,233.28 = 694.28 : x
  2. Step 2: Convert to fraction form
    2,155.16/3,233.28 = 694.28/x
  3. Step 3: Cross multiply
    2,155.16x = 3,233.28 × 694.28
  4. Step 4: Simplify right side
    2,155.16x = 2,244,801.64
  5. Step 5: Solve for x
    x = 2,244,801.64/2,155.16
  6. Step 6: Final answer
    x = 1,041.59

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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.