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Finding the Fourth Proportional to 1,080.04, 1,617.64 and 939.41

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Solution

The fourth proportional to 1,080.04, 1,617.64 and 939.41 is: 1,407.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.04 : 1,617.64 = 939.41 : x
  2. Step 2: Convert to fraction form
    1,080.04/1,617.64 = 939.41/x
  3. Step 3: Cross multiply
    1,080.04x = 1,617.64 × 939.41
  4. Step 4: Simplify right side
    1,080.04x = 1,519,627.19
  5. Step 5: Solve for x
    x = 1,519,627.19/1,080.04
  6. Step 6: Final answer
    x = 1,407.01

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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.