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Finding the Fourth Proportional to 719.17, 992.16 and 439.30

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Solution

The fourth proportional to 719.17, 992.16 and 439.30 is: 606.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.17 : 992.16 = 439.30 : x
  2. Step 2: Convert to fraction form
    719.17/992.16 = 439.30/x
  3. Step 3: Cross multiply
    719.17x = 992.16 × 439.30
  4. Step 4: Simplify right side
    719.17x = 435,857.13
  5. Step 5: Solve for x
    x = 435,857.13/719.17
  6. Step 6: Final answer
    x = 606.06

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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.