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Finding the Fourth Proportional to 1,890.84, 2,836.56 and 658.44

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Solution

The fourth proportional to 1,890.84, 2,836.56 and 658.44 is: 987.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.84 : 2,836.56 = 658.44 : x
  2. Step 2: Convert to fraction form
    1,890.84/2,836.56 = 658.44/x
  3. Step 3: Cross multiply
    1,890.84x = 2,836.56 × 658.44
  4. Step 4: Simplify right side
    1,890.84x = 1,867,704.57
  5. Step 5: Solve for x
    x = 1,867,704.57/1,890.84
  6. Step 6: Final answer
    x = 987.76

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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.