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Finding the Fourth Proportional to 1,788.76, 2,683.44 and 693.28

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Solution

The fourth proportional to 1,788.76, 2,683.44 and 693.28 is: 1,040.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,788.76 : 2,683.44 = 693.28 : x
  2. Step 2: Convert to fraction form
    1,788.76/2,683.44 = 693.28/x
  3. Step 3: Cross multiply
    1,788.76x = 2,683.44 × 693.28
  4. Step 4: Simplify right side
    1,788.76x = 1,860,375.28
  5. Step 5: Solve for x
    x = 1,860,375.28/1,788.76
  6. Step 6: Final answer
    x = 1,040.04

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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.