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Finding the Fourth Proportional to 1,174.64, 1,761.92 and 352.80

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Solution

The fourth proportional to 1,174.64, 1,761.92 and 352.80 is: 529.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.64 : 1,761.92 = 352.80 : x
  2. Step 2: Convert to fraction form
    1,174.64/1,761.92 = 352.80/x
  3. Step 3: Cross multiply
    1,174.64x = 1,761.92 × 352.80
  4. Step 4: Simplify right side
    1,174.64x = 621,605.38
  5. Step 5: Solve for x
    x = 621,605.38/1,174.64
  6. Step 6: Final answer
    x = 529.19

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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.