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Finding the Fourth Proportional to 2,219.26, 3,328.32 and 658.90

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Solution

The fourth proportional to 2,219.26, 3,328.32 and 658.90 is: 988.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.26 : 3,328.32 = 658.90 : x
  2. Step 2: Convert to fraction form
    2,219.26/3,328.32 = 658.90/x
  3. Step 3: Cross multiply
    2,219.26x = 3,328.32 × 658.90
  4. Step 4: Simplify right side
    2,219.26x = 2,193,030.05
  5. Step 5: Solve for x
    x = 2,193,030.05/2,219.26
  6. Step 6: Final answer
    x = 988.18

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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.