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Finding the Fourth Proportional to 3,970.86, 5,479.98 and 2,202.50

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Solution

The fourth proportional to 3,970.86, 5,479.98 and 2,202.50 is: 3,039.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.86 : 5,479.98 = 2,202.50 : x
  2. Step 2: Convert to fraction form
    3,970.86/5,479.98 = 2,202.50/x
  3. Step 3: Cross multiply
    3,970.86x = 5,479.98 × 2,202.50
  4. Step 4: Simplify right side
    3,970.86x = 12,069,655.95
  5. Step 5: Solve for x
    x = 12,069,655.95/3,970.86
  6. Step 6: Final answer
    x = 3,039.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.