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Finding the Fourth Proportional to 1,890.59, 2,836.49 and 658.58

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Solution

The fourth proportional to 1,890.59, 2,836.49 and 658.58 is: 988.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.59 : 2,836.49 = 658.58 : x
  2. Step 2: Convert to fraction form
    1,890.59/2,836.49 = 658.58/x
  3. Step 3: Cross multiply
    1,890.59x = 2,836.49 × 658.58
  4. Step 4: Simplify right side
    1,890.59x = 1,868,038.11
  5. Step 5: Solve for x
    x = 1,868,038.11/1,890.59
  6. Step 6: Final answer
    x = 988.07

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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.