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Finding the Fourth Proportional to 1,227.58, 1,694 and 703.54

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Solution

The fourth proportional to 1,227.58, 1,694 and 703.54 is: 970.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227.58 : 1,694 = 703.54 : x
  2. Step 2: Convert to fraction form
    1,227.58/1,694 = 703.54/x
  3. Step 3: Cross multiply
    1,227.58x = 1,694 × 703.54
  4. Step 4: Simplify right side
    1,227.58x = 1,191,796.76
  5. Step 5: Solve for x
    x = 1,191,796.76/1,227.58
  6. Step 6: Final answer
    x = 970.85

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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.