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Finding the Fourth Proportional to 2,768.73, 4,152.13 and 919.35

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Solution

The fourth proportional to 2,768.73, 4,152.13 and 919.35 is: 1,378.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.73 : 4,152.13 = 919.35 : x
  2. Step 2: Convert to fraction form
    2,768.73/4,152.13 = 919.35/x
  3. Step 3: Cross multiply
    2,768.73x = 4,152.13 × 919.35
  4. Step 4: Simplify right side
    2,768.73x = 3,817,258.42
  5. Step 5: Solve for x
    x = 3,817,258.42/2,768.73
  6. Step 6: Final answer
    x = 1,378.70

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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.