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Finding the Fourth Proportional to 719.17, 992.34 and 404.42

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Solution

The fourth proportional to 719.17, 992.34 and 404.42 is: 558.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.17 : 992.34 = 404.42 : x
  2. Step 2: Convert to fraction form
    719.17/992.34 = 404.42/x
  3. Step 3: Cross multiply
    719.17x = 992.34 × 404.42
  4. Step 4: Simplify right side
    719.17x = 401,317.18
  5. Step 5: Solve for x
    x = 401,317.18/719.17
  6. Step 6: Final answer
    x = 558.03

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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.