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Finding the Fourth Proportional to 2,157, 3,233.88 and 695.28

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Solution

The fourth proportional to 2,157, 3,233.88 and 695.28 is: 1,042.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157 : 3,233.88 = 695.28 : x
  2. Step 2: Convert to fraction form
    2,157/3,233.88 = 695.28/x
  3. Step 3: Cross multiply
    2,157x = 3,233.88 × 695.28
  4. Step 4: Simplify right side
    2,157x = 2,248,452.09
  5. Step 5: Solve for x
    x = 2,248,452.09/2,157
  6. Step 6: Final answer
    x = 1,042.40

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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.