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Finding the Fourth Proportional to 2,157.10, 3,235.82 and 696.25

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Solution

The fourth proportional to 2,157.10, 3,235.82 and 696.25 is: 1,044.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.10 : 3,235.82 = 696.25 : x
  2. Step 2: Convert to fraction form
    2,157.10/3,235.82 = 696.25/x
  3. Step 3: Cross multiply
    2,157.10x = 3,235.82 × 696.25
  4. Step 4: Simplify right side
    2,157.10x = 2,252,946.19
  5. Step 5: Solve for x
    x = 2,252,946.19/2,157.10
  6. Step 6: Final answer
    x = 1,044.43

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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.