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Finding the Fourth Proportional to 1,921.77, 2,880.28 and 996.79

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Solution

The fourth proportional to 1,921.77, 2,880.28 and 996.79 is: 1,493.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.77 : 2,880.28 = 996.79 : x
  2. Step 2: Convert to fraction form
    1,921.77/2,880.28 = 996.79/x
  3. Step 3: Cross multiply
    1,921.77x = 2,880.28 × 996.79
  4. Step 4: Simplify right side
    1,921.77x = 2,871,034.30
  5. Step 5: Solve for x
    x = 2,871,034.30/1,921.77
  6. Step 6: Final answer
    x = 1,493.95

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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.