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Finding the Fourth Proportional to 1,090.51, 1,634.79 and 396.74

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Solution

The fourth proportional to 1,090.51, 1,634.79 and 396.74 is: 594.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.51 : 1,634.79 = 396.74 : x
  2. Step 2: Convert to fraction form
    1,090.51/1,634.79 = 396.74/x
  3. Step 3: Cross multiply
    1,090.51x = 1,634.79 × 396.74
  4. Step 4: Simplify right side
    1,090.51x = 648,586.58
  5. Step 5: Solve for x
    x = 648,586.58/1,090.51
  6. Step 6: Final answer
    x = 594.76

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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.