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Finding the Fourth Proportional to 1,859.38, 2,788.38 and 748.42

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Solution

The fourth proportional to 1,859.38, 2,788.38 and 748.42 is: 1,122.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,859.38 : 2,788.38 = 748.42 : x
  2. Step 2: Convert to fraction form
    1,859.38/2,788.38 = 748.42/x
  3. Step 3: Cross multiply
    1,859.38x = 2,788.38 × 748.42
  4. Step 4: Simplify right side
    1,859.38x = 2,086,879.36
  5. Step 5: Solve for x
    x = 2,086,879.36/1,859.38
  6. Step 6: Final answer
    x = 1,122.35

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1.5x scale

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.