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Finding the Fourth Proportional to 719.88, 992.97 and 425.24

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Solution

The fourth proportional to 719.88, 992.97 and 425.24 is: 586.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.88 : 992.97 = 425.24 : x
  2. Step 2: Convert to fraction form
    719.88/992.97 = 425.24/x
  3. Step 3: Cross multiply
    719.88x = 992.97 × 425.24
  4. Step 4: Simplify right side
    719.88x = 422,250.56
  5. Step 5: Solve for x
    x = 422,250.56/719.88
  6. Step 6: Final answer
    x = 586.56

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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.