Home / 2,188.14-3,278.49-1,320.63

Finding the Fourth Proportional to 2,188.14, 3,278.49 and 1,320.63

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Solution

The fourth proportional to 2,188.14, 3,278.49 and 1,320.63 is: 1,978.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.14 : 3,278.49 = 1,320.63 : x
  2. Step 2: Convert to fraction form
    2,188.14/3,278.49 = 1,320.63/x
  3. Step 3: Cross multiply
    2,188.14x = 3,278.49 × 1,320.63
  4. Step 4: Simplify right side
    2,188.14x = 4,329,655.86
  5. Step 5: Solve for x
    x = 4,329,655.86/2,188.14
  6. Step 6: Final answer
    x = 1,978.70

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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.