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Finding the Fourth Proportional to 1,393.67, 2,090.19 and 406.23

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Solution

The fourth proportional to 1,393.67, 2,090.19 and 406.23 is: 609.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.67 : 2,090.19 = 406.23 : x
  2. Step 2: Convert to fraction form
    1,393.67/2,090.19 = 406.23/x
  3. Step 3: Cross multiply
    1,393.67x = 2,090.19 × 406.23
  4. Step 4: Simplify right side
    1,393.67x = 849,101.04
  5. Step 5: Solve for x
    x = 849,101.04/1,393.67
  6. Step 6: Final answer
    x = 609.25

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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.