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Finding the Fourth Proportional to 1,853.90, 2,780.85 and 758.02

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Solution

The fourth proportional to 1,853.90, 2,780.85 and 758.02 is: 1,137.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,853.90 : 2,780.85 = 758.02 : x
  2. Step 2: Convert to fraction form
    1,853.90/2,780.85 = 758.02/x
  3. Step 3: Cross multiply
    1,853.90x = 2,780.85 × 758.02
  4. Step 4: Simplify right side
    1,853.90x = 2,107,939.92
  5. Step 5: Solve for x
    x = 2,107,939.92/1,853.90
  6. Step 6: Final answer
    x = 1,137.03

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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.