Home / 1,080.05-1,619.10-640.22

Finding the Fourth Proportional to 1,080.05, 1,619.10 and 640.22

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Solution

The fourth proportional to 1,080.05, 1,619.10 and 640.22 is: 959.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.05 : 1,619.10 = 640.22 : x
  2. Step 2: Convert to fraction form
    1,080.05/1,619.10 = 640.22/x
  3. Step 3: Cross multiply
    1,080.05x = 1,619.10 × 640.22
  4. Step 4: Simplify right side
    1,080.05x = 1,036,572.11
  5. Step 5: Solve for x
    x = 1,036,572.11/1,080.05
  6. Step 6: Final answer
    x = 959.75

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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.