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Finding the Fourth Proportional to 2,674.32, 4,012.20 and 919.44

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Solution

The fourth proportional to 2,674.32, 4,012.20 and 919.44 is: 1,379.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,674.32 : 4,012.20 = 919.44 : x
  2. Step 2: Convert to fraction form
    2,674.32/4,012.20 = 919.44/x
  3. Step 3: Cross multiply
    2,674.32x = 4,012.20 × 919.44
  4. Step 4: Simplify right side
    2,674.32x = 3,688,977.17
  5. Step 5: Solve for x
    x = 3,688,977.17/2,674.32
  6. Step 6: Final answer
    x = 1,379.41

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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.