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Finding the Fourth Proportional to 719, 992.25 and 404.24

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Solution

The fourth proportional to 719, 992.25 and 404.24 is: 557.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    719 : 992.25 = 404.24 : x
  2. Step 2: Convert to fraction form
    719/992.25 = 404.24/x
  3. Step 3: Cross multiply
    719x = 992.25 × 404.24
  4. Step 4: Simplify right side
    719x = 401,107.14
  5. Step 5: Solve for x
    x = 401,107.14/719
  6. Step 6: Final answer
    x = 557.87

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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.