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Finding the Fourth Proportional to 1,316.70, 1,817.04 and 727.23

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Solution

The fourth proportional to 1,316.70, 1,817.04 and 727.23 is: 1,003.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.70 : 1,817.04 = 727.23 : x
  2. Step 2: Convert to fraction form
    1,316.70/1,817.04 = 727.23/x
  3. Step 3: Cross multiply
    1,316.70x = 1,817.04 × 727.23
  4. Step 4: Simplify right side
    1,316.70x = 1,321,402.36
  5. Step 5: Solve for x
    x = 1,321,402.36/1,316.70
  6. Step 6: Final answer
    x = 1,003.58

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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.