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Finding the Fourth Proportional to 719.09, 992.75 and 549.71

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Solution

The fourth proportional to 719.09, 992.75 and 549.71 is: 758.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.09 : 992.75 = 549.71 : x
  2. Step 2: Convert to fraction form
    719.09/992.75 = 549.71/x
  3. Step 3: Cross multiply
    719.09x = 992.75 × 549.71
  4. Step 4: Simplify right side
    719.09x = 545,716.89
  5. Step 5: Solve for x
    x = 545,716.89/719.09
  6. Step 6: Final answer
    x = 758.90

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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.