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Finding the Fourth Proportional to 300,689.28, 450,999.36 and 79,090.56

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Solution

The fourth proportional to 300,689.28, 450,999.36 and 79,090.56 is: 118,626.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,689.28 : 450,999.36 = 79,090.56 : x
  2. Step 2: Convert to fraction form
    300,689.28/450,999.36 = 79,090.56/x
  3. Step 3: Cross multiply
    300,689.28x = 450,999.36 × 79,090.56
  4. Step 4: Simplify right side
    300,689.28x = 35,669,791,942.04
  5. Step 5: Solve for x
    x = 35,669,791,942.04/300,689.28
  6. Step 6: Final answer
    x = 118,626.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.