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Finding the Fourth Proportional to 1,090.68, 1,635.97 and 760.66

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Solution

The fourth proportional to 1,090.68, 1,635.97 and 760.66 is: 1,140.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.68 : 1,635.97 = 760.66 : x
  2. Step 2: Convert to fraction form
    1,090.68/1,635.97 = 760.66/x
  3. Step 3: Cross multiply
    1,090.68x = 1,635.97 × 760.66
  4. Step 4: Simplify right side
    1,090.68x = 1,244,416.94
  5. Step 5: Solve for x
    x = 1,244,416.94/1,090.68
  6. Step 6: Final answer
    x = 1,140.96

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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.