Home / 2,768.16-4,152.56-919.40

Finding the Fourth Proportional to 2,768.16, 4,152.56 and 919.40

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Solution

The fourth proportional to 2,768.16, 4,152.56 and 919.40 is: 1,379.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.16 : 4,152.56 = 919.40 : x
  2. Step 2: Convert to fraction form
    2,768.16/4,152.56 = 919.40/x
  3. Step 3: Cross multiply
    2,768.16x = 4,152.56 × 919.40
  4. Step 4: Simplify right side
    2,768.16x = 3,817,863.66
  5. Step 5: Solve for x
    x = 3,817,863.66/2,768.16
  6. Step 6: Final answer
    x = 1,379.21

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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.