Home / 2,921.54-4,384.02-1,072.78

Finding the Fourth Proportional to 2,921.54, 4,384.02 and 1,072.78

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Solution

The fourth proportional to 2,921.54, 4,384.02 and 1,072.78 is: 1,609.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.54 : 4,384.02 = 1,072.78 : x
  2. Step 2: Convert to fraction form
    2,921.54/4,384.02 = 1,072.78/x
  3. Step 3: Cross multiply
    2,921.54x = 4,384.02 × 1,072.78
  4. Step 4: Simplify right side
    2,921.54x = 4,703,082.04
  5. Step 5: Solve for x
    x = 4,703,082.04/2,921.54
  6. Step 6: Final answer
    x = 1,609.80

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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.