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Finding the Fourth Proportional to 2,012.44, 3,017.76 and 778.90

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Solution

The fourth proportional to 2,012.44, 3,017.76 and 778.90 is: 1,168.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,012.44 : 3,017.76 = 778.90 : x
  2. Step 2: Convert to fraction form
    2,012.44/3,017.76 = 778.90/x
  3. Step 3: Cross multiply
    2,012.44x = 3,017.76 × 778.90
  4. Step 4: Simplify right side
    2,012.44x = 2,350,533.26
  5. Step 5: Solve for x
    x = 2,350,533.26/2,012.44
  6. Step 6: Final answer
    x = 1,168.00

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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.