Home / 2,649.03-3,970.85-1,187.79

Finding the Fourth Proportional to 2,649.03, 3,970.85 and 1,187.79

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Solution

The fourth proportional to 2,649.03, 3,970.85 and 1,187.79 is: 1,780.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,649.03 : 3,970.85 = 1,187.79 : x
  2. Step 2: Convert to fraction form
    2,649.03/3,970.85 = 1,187.79/x
  3. Step 3: Cross multiply
    2,649.03x = 3,970.85 × 1,187.79
  4. Step 4: Simplify right side
    2,649.03x = 4,716,529.98
  5. Step 5: Solve for x
    x = 4,716,529.98/2,649.03
  6. Step 6: Final answer
    x = 1,780.47

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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.