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Finding the Fourth Proportional to 481,678.74, 722,742.30 and 215,619.30

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Solution

The fourth proportional to 481,678.74, 722,742.30 and 215,619.30 is: 323,529.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,678.74 : 722,742.30 = 215,619.30 : x
  2. Step 2: Convert to fraction form
    481,678.74/722,742.30 = 215,619.30/x
  3. Step 3: Cross multiply
    481,678.74x = 722,742.30 × 215,619.30
  4. Step 4: Simplify right side
    481,678.74x = 155,837,188,806.39
  5. Step 5: Solve for x
    x = 155,837,188,806.39/481,678.74
  6. Step 6: Final answer
    x = 323,529.31

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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.