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Finding the Fourth Proportional to 2,011.70, 3,017.58 and 779.18

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Solution

The fourth proportional to 2,011.70, 3,017.58 and 779.18 is: 1,168.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,011.70 : 3,017.58 = 779.18 : x
  2. Step 2: Convert to fraction form
    2,011.70/3,017.58 = 779.18/x
  3. Step 3: Cross multiply
    2,011.70x = 3,017.58 × 779.18
  4. Step 4: Simplify right side
    2,011.70x = 2,351,237.98
  5. Step 5: Solve for x
    x = 2,351,237.98/2,011.70
  6. Step 6: Final answer
    x = 1,168.78

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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.