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Finding the Fourth Proportional to 1,228.03, 1,694.70 and 704.05

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Solution

The fourth proportional to 1,228.03, 1,694.70 and 704.05 is: 971.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.03 : 1,694.70 = 704.05 : x
  2. Step 2: Convert to fraction form
    1,228.03/1,694.70 = 704.05/x
  3. Step 3: Cross multiply
    1,228.03x = 1,694.70 × 704.05
  4. Step 4: Simplify right side
    1,228.03x = 1,193,149.30
  5. Step 5: Solve for x
    x = 1,193,149.30/1,228.03
  6. Step 6: Final answer
    x = 971.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.