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Finding the Fourth Proportional to 1,174.96, 1,620.12 and 879.28

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Solution

The fourth proportional to 1,174.96, 1,620.12 and 879.28 is: 1,212.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.96 : 1,620.12 = 879.28 : x
  2. Step 2: Convert to fraction form
    1,174.96/1,620.12 = 879.28/x
  3. Step 3: Cross multiply
    1,174.96x = 1,620.12 × 879.28
  4. Step 4: Simplify right side
    1,174.96x = 1,424,539.11
  5. Step 5: Solve for x
    x = 1,424,539.11/1,174.96
  6. Step 6: Final answer
    x = 1,212.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.