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Finding the Fourth Proportional to 1,069.33, 1,475.99 and 676.48

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Solution

The fourth proportional to 1,069.33, 1,475.99 and 676.48 is: 933.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.33 : 1,475.99 = 676.48 : x
  2. Step 2: Convert to fraction form
    1,069.33/1,475.99 = 676.48/x
  3. Step 3: Cross multiply
    1,069.33x = 1,475.99 × 676.48
  4. Step 4: Simplify right side
    1,069.33x = 998,472.03
  5. Step 5: Solve for x
    x = 998,472.03/1,069.33
  6. Step 6: Final answer
    x = 933.74

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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.