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Finding the Fourth Proportional to 2,017.80, 3,028.32 and 785.78

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Solution

The fourth proportional to 2,017.80, 3,028.32 and 785.78 is: 1,179.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,017.80 : 3,028.32 = 785.78 : x
  2. Step 2: Convert to fraction form
    2,017.80/3,028.32 = 785.78/x
  3. Step 3: Cross multiply
    2,017.80x = 3,028.32 × 785.78
  4. Step 4: Simplify right side
    2,017.80x = 2,379,593.29
  5. Step 5: Solve for x
    x = 2,379,593.29/2,017.80
  6. Step 6: Final answer
    x = 1,179.30

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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.