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Finding the Fourth Proportional to 1,393.97, 2,090.88 and 469.55

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Solution

The fourth proportional to 1,393.97, 2,090.88 and 469.55 is: 704.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.97 : 2,090.88 = 469.55 : x
  2. Step 2: Convert to fraction form
    1,393.97/2,090.88 = 469.55/x
  3. Step 3: Cross multiply
    1,393.97x = 2,090.88 × 469.55
  4. Step 4: Simplify right side
    1,393.97x = 981,777.93
  5. Step 5: Solve for x
    x = 981,777.93/1,393.97
  6. Step 6: Final answer
    x = 704.31

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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.