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Finding the Fourth Proportional to 2,200.88, 3,298.99 and 813.32

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Solution

The fourth proportional to 2,200.88, 3,298.99 and 813.32 is: 1,219.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,200.88 : 3,298.99 = 813.32 : x
  2. Step 2: Convert to fraction form
    2,200.88/3,298.99 = 813.32/x
  3. Step 3: Cross multiply
    2,200.88x = 3,298.99 × 813.32
  4. Step 4: Simplify right side
    2,200.88x = 2,683,130.48
  5. Step 5: Solve for x
    x = 2,683,130.48/2,200.88
  6. Step 6: Final answer
    x = 1,219.12

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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.