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Finding the Fourth Proportional to 1,128.33, 1,692.99 and 607.73

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Solution

The fourth proportional to 1,128.33, 1,692.99 and 607.73 is: 911.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.33 : 1,692.99 = 607.73 : x
  2. Step 2: Convert to fraction form
    1,128.33/1,692.99 = 607.73/x
  3. Step 3: Cross multiply
    1,128.33x = 1,692.99 × 607.73
  4. Step 4: Simplify right side
    1,128.33x = 1,028,872.35
  5. Step 5: Solve for x
    x = 1,028,872.35/1,128.33
  6. Step 6: Final answer
    x = 911.85

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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.