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Finding the Fourth Proportional to 1,174.96, 1,761.96 and 405.28

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Solution

The fourth proportional to 1,174.96, 1,761.96 and 405.28 is: 607.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.96 : 1,761.96 = 405.28 : x
  2. Step 2: Convert to fraction form
    1,174.96/1,761.96 = 405.28/x
  3. Step 3: Cross multiply
    1,174.96x = 1,761.96 × 405.28
  4. Step 4: Simplify right side
    1,174.96x = 714,087.15
  5. Step 5: Solve for x
    x = 714,087.15/1,174.96
  6. Step 6: Final answer
    x = 607.75

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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.