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Finding the Fourth Proportional to 1,974.19, 2,961.33 and 658.49

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Solution

The fourth proportional to 1,974.19, 2,961.33 and 658.49 is: 987.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,974.19 : 2,961.33 = 658.49 : x
  2. Step 2: Convert to fraction form
    1,974.19/2,961.33 = 658.49/x
  3. Step 3: Cross multiply
    1,974.19x = 2,961.33 × 658.49
  4. Step 4: Simplify right side
    1,974.19x = 1,950,015.29
  5. Step 5: Solve for x
    x = 1,950,015.29/1,974.19
  6. Step 6: Final answer
    x = 987.75

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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.