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Finding the Fourth Proportional to 2,219.49, 3,328.20 and 658.92

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Solution

The fourth proportional to 2,219.49, 3,328.20 and 658.92 is: 988.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.49 : 3,328.20 = 658.92 : x
  2. Step 2: Convert to fraction form
    2,219.49/3,328.20 = 658.92/x
  3. Step 3: Cross multiply
    2,219.49x = 3,328.20 × 658.92
  4. Step 4: Simplify right side
    2,219.49x = 2,193,017.54
  5. Step 5: Solve for x
    x = 2,193,017.54/2,219.49
  6. Step 6: Final answer
    x = 988.07

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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.