Home / 1,990.12-2,748.58-1,977.32

Finding the Fourth Proportional to 1,990.12, 2,748.58 and 1,977.32

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Solution

The fourth proportional to 1,990.12, 2,748.58 and 1,977.32 is: 2,730.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.12 : 2,748.58 = 1,977.32 : x
  2. Step 2: Convert to fraction form
    1,990.12/2,748.58 = 1,977.32/x
  3. Step 3: Cross multiply
    1,990.12x = 2,748.58 × 1,977.32
  4. Step 4: Simplify right side
    1,990.12x = 5,434,822.21
  5. Step 5: Solve for x
    x = 5,434,822.21/1,990.12
  6. Step 6: Final answer
    x = 2,730.90

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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.