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Finding the Fourth Proportional to 719.96, 993.56 and 425.30

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Solution

The fourth proportional to 719.96, 993.56 and 425.30 is: 586.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.96 : 993.56 = 425.30 : x
  2. Step 2: Convert to fraction form
    719.96/993.56 = 425.30/x
  3. Step 3: Cross multiply
    719.96x = 993.56 × 425.30
  4. Step 4: Simplify right side
    719.96x = 422,553.97
  5. Step 5: Solve for x
    x = 422,553.97/719.96
  6. Step 6: Final answer
    x = 586.92

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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.