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Finding the Fourth Proportional to 719.37, 992.61 and 439.55

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Solution

The fourth proportional to 719.37, 992.61 and 439.55 is: 606.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.37 : 992.61 = 439.55 : x
  2. Step 2: Convert to fraction form
    719.37/992.61 = 439.55/x
  3. Step 3: Cross multiply
    719.37x = 992.61 × 439.55
  4. Step 4: Simplify right side
    719.37x = 436,301.73
  5. Step 5: Solve for x
    x = 436,301.73/719.37
  6. Step 6: Final answer
    x = 606.51

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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.