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Finding the Fourth Proportional to 1,230.87, 1,698.19 and 733.60

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Solution

The fourth proportional to 1,230.87, 1,698.19 and 733.60 is: 1,012.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.87 : 1,698.19 = 733.60 : x
  2. Step 2: Convert to fraction form
    1,230.87/1,698.19 = 733.60/x
  3. Step 3: Cross multiply
    1,230.87x = 1,698.19 × 733.60
  4. Step 4: Simplify right side
    1,230.87x = 1,245,786.10
  5. Step 5: Solve for x
    x = 1,245,786.10/1,230.87
  6. Step 6: Final answer
    x = 1,012.12

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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.