Home / 1,639.30-2,263.05-1,080.13

Finding the Fourth Proportional to 1,639.30, 2,263.05 and 1,080.13

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Solution

The fourth proportional to 1,639.30, 2,263.05 and 1,080.13 is: 1,491.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.30 : 2,263.05 = 1,080.13 : x
  2. Step 2: Convert to fraction form
    1,639.30/2,263.05 = 1,080.13/x
  3. Step 3: Cross multiply
    1,639.30x = 2,263.05 × 1,080.13
  4. Step 4: Simplify right side
    1,639.30x = 2,444,388.20
  5. Step 5: Solve for x
    x = 2,444,388.20/1,639.30
  6. Step 6: Final answer
    x = 1,491.12

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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.