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Finding the Fourth Proportional to 719.03, 994.43 and 645.32

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Solution

The fourth proportional to 719.03, 994.43 and 645.32 is: 892.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.03 : 994.43 = 645.32 : x
  2. Step 2: Convert to fraction form
    719.03/994.43 = 645.32/x
  3. Step 3: Cross multiply
    719.03x = 994.43 × 645.32
  4. Step 4: Simplify right side
    719.03x = 641,725.57
  5. Step 5: Solve for x
    x = 641,725.57/719.03
  6. Step 6: Final answer
    x = 892.49

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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.