Home / 1,985.87-2,740.68-1,101.85

Finding the Fourth Proportional to 1,985.87, 2,740.68 and 1,101.85

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Solution

The fourth proportional to 1,985.87, 2,740.68 and 1,101.85 is: 1,520.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.87 : 2,740.68 = 1,101.85 : x
  2. Step 2: Convert to fraction form
    1,985.87/2,740.68 = 1,101.85/x
  3. Step 3: Cross multiply
    1,985.87x = 2,740.68 × 1,101.85
  4. Step 4: Simplify right side
    1,985.87x = 3,019,811.41
  5. Step 5: Solve for x
    x = 3,019,811.41/1,985.87
  6. Step 6: Final answer
    x = 1,520.65

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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.