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Finding the Fourth Proportional to 719.57, 992.98 and 404.83

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Solution

The fourth proportional to 719.57, 992.98 and 404.83 is: 558.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.57 : 992.98 = 404.83 : x
  2. Step 2: Convert to fraction form
    719.57/992.98 = 404.83/x
  3. Step 3: Cross multiply
    719.57x = 992.98 × 404.83
  4. Step 4: Simplify right side
    719.57x = 401,988.09
  5. Step 5: Solve for x
    x = 401,988.09/719.57
  6. Step 6: Final answer
    x = 558.65

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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.