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Finding the Fourth Proportional to 3,885.84, 5,828.67 and 1,288.62

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Solution

The fourth proportional to 3,885.84, 5,828.67 and 1,288.62 is: 1,932.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.84 : 5,828.67 = 1,288.62 : x
  2. Step 2: Convert to fraction form
    3,885.84/5,828.67 = 1,288.62/x
  3. Step 3: Cross multiply
    3,885.84x = 5,828.67 × 1,288.62
  4. Step 4: Simplify right side
    3,885.84x = 7,510,940.74
  5. Step 5: Solve for x
    x = 7,510,940.74/3,885.84
  6. Step 6: Final answer
    x = 1,932.90

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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.