Home / 2,124.15-3,186.21-663.30

Finding the Fourth Proportional to 2,124.15, 3,186.21 and 663.30

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Solution

The fourth proportional to 2,124.15, 3,186.21 and 663.30 is: 994.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,124.15 : 3,186.21 = 663.30 : x
  2. Step 2: Convert to fraction form
    2,124.15/3,186.21 = 663.30/x
  3. Step 3: Cross multiply
    2,124.15x = 3,186.21 × 663.30
  4. Step 4: Simplify right side
    2,124.15x = 2,113,413.09
  5. Step 5: Solve for x
    x = 2,113,413.09/2,124.15
  6. Step 6: Final answer
    x = 994.95

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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.