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Finding the Fourth Proportional to 719.87, 992.14 and 620.03

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Solution

The fourth proportional to 719.87, 992.14 and 620.03 is: 854.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.87 : 992.14 = 620.03 : x
  2. Step 2: Convert to fraction form
    719.87/992.14 = 620.03/x
  3. Step 3: Cross multiply
    719.87x = 992.14 × 620.03
  4. Step 4: Simplify right side
    719.87x = 615,150.05
  5. Step 5: Solve for x
    x = 615,150.05/719.87
  6. Step 6: Final answer
    x = 854.54

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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.