Home / 2,125.18-3,188.10-663.99

Finding the Fourth Proportional to 2,125.18, 3,188.10 and 663.99

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Solution

The fourth proportional to 2,125.18, 3,188.10 and 663.99 is: 996.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.18 : 3,188.10 = 663.99 : x
  2. Step 2: Convert to fraction form
    2,125.18/3,188.10 = 663.99/x
  3. Step 3: Cross multiply
    2,125.18x = 3,188.10 × 663.99
  4. Step 4: Simplify right side
    2,125.18x = 2,116,863.20
  5. Step 5: Solve for x
    x = 2,116,863.20/2,125.18
  6. Step 6: Final answer
    x = 996.09

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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.