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Finding the Fourth Proportional to 1,384.89, 2,077.35 and 411.27

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Solution

The fourth proportional to 1,384.89, 2,077.35 and 411.27 is: 616.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.89 : 2,077.35 = 411.27 : x
  2. Step 2: Convert to fraction form
    1,384.89/2,077.35 = 411.27/x
  3. Step 3: Cross multiply
    1,384.89x = 2,077.35 × 411.27
  4. Step 4: Simplify right side
    1,384.89x = 854,351.73
  5. Step 5: Solve for x
    x = 854,351.73/1,384.89
  6. Step 6: Final answer
    x = 616.91

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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.