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Finding the Fourth Proportional to 1,173.58, 1,618.44 and 731.17

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Solution

The fourth proportional to 1,173.58, 1,618.44 and 731.17 is: 1,008.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.58 : 1,618.44 = 731.17 : x
  2. Step 2: Convert to fraction form
    1,173.58/1,618.44 = 731.17/x
  3. Step 3: Cross multiply
    1,173.58x = 1,618.44 × 731.17
  4. Step 4: Simplify right side
    1,173.58x = 1,183,354.77
  5. Step 5: Solve for x
    x = 1,183,354.77/1,173.58
  6. Step 6: Final answer
    x = 1,008.33

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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.