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Finding the Fourth Proportional to 719.21, 992.23 and 439.22

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Solution

The fourth proportional to 719.21, 992.23 and 439.22 is: 605.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.21 : 992.23 = 439.22 : x
  2. Step 2: Convert to fraction form
    719.21/992.23 = 439.22/x
  3. Step 3: Cross multiply
    719.21x = 992.23 × 439.22
  4. Step 4: Simplify right side
    719.21x = 435,802.30
  5. Step 5: Solve for x
    x = 435,802.30/719.21
  6. Step 6: Final answer
    x = 605.95

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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.