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Finding the Fourth Proportional to 1,090.10, 1,635.35 and 359.73

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Solution

The fourth proportional to 1,090.10, 1,635.35 and 359.73 is: 539.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.10 : 1,635.35 = 359.73 : x
  2. Step 2: Convert to fraction form
    1,090.10/1,635.35 = 359.73/x
  3. Step 3: Cross multiply
    1,090.10x = 1,635.35 × 359.73
  4. Step 4: Simplify right side
    1,090.10x = 588,284.46
  5. Step 5: Solve for x
    x = 588,284.46/1,090.10
  6. Step 6: Final answer
    x = 539.66

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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.