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Finding the Fourth Proportional to 719.10, 992.37 and 408.60

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Solution

The fourth proportional to 719.10, 992.37 and 408.60 is: 563.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.10 : 992.37 = 408.60 : x
  2. Step 2: Convert to fraction form
    719.10/992.37 = 408.60/x
  3. Step 3: Cross multiply
    719.10x = 992.37 × 408.60
  4. Step 4: Simplify right side
    719.10x = 405,480.34
  5. Step 5: Solve for x
    x = 405,480.34/719.10
  6. Step 6: Final answer
    x = 563.87

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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.