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Finding the Fourth Proportional to 1,090.05, 1,635.48 and 505.34

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Solution

The fourth proportional to 1,090.05, 1,635.48 and 505.34 is: 758.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.05 : 1,635.48 = 505.34 : x
  2. Step 2: Convert to fraction form
    1,090.05/1,635.48 = 505.34/x
  3. Step 3: Cross multiply
    1,090.05x = 1,635.48 × 505.34
  4. Step 4: Simplify right side
    1,090.05x = 826,465.29
  5. Step 5: Solve for x
    x = 826,465.29/1,090.05
  6. Step 6: Final answer
    x = 758.19

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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.