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Finding the Fourth Proportional to 1,393.42, 2,090.48 and 983.36

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Solution

The fourth proportional to 1,393.42, 2,090.48 and 983.36 is: 1,475.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.42 : 2,090.48 = 983.36 : x
  2. Step 2: Convert to fraction form
    1,393.42/2,090.48 = 983.36/x
  3. Step 3: Cross multiply
    1,393.42x = 2,090.48 × 983.36
  4. Step 4: Simplify right side
    1,393.42x = 2,055,694.41
  5. Step 5: Solve for x
    x = 2,055,694.41/1,393.42
  6. Step 6: Final answer
    x = 1,475.29

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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.