Home / 1,980.10-2,732.50-1,095.90

Finding the Fourth Proportional to 1,980.10, 2,732.50 and 1,095.90

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Solution

The fourth proportional to 1,980.10, 2,732.50 and 1,095.90 is: 1,512.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.10 : 2,732.50 = 1,095.90 : x
  2. Step 2: Convert to fraction form
    1,980.10/2,732.50 = 1,095.90/x
  3. Step 3: Cross multiply
    1,980.10x = 2,732.50 × 1,095.90
  4. Step 4: Simplify right side
    1,980.10x = 2,994,534.44
  5. Step 5: Solve for x
    x = 2,994,534.44/1,980.10
  6. Step 6: Final answer
    x = 1,512.32

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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.