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Finding the Fourth Proportional to 398,707.36, 550,229.45 and 217,429.21

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Solution

The fourth proportional to 398,707.36, 550,229.45 and 217,429.21 is: 300,059.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,707.36 : 550,229.45 = 217,429.21 : x
  2. Step 2: Convert to fraction form
    398,707.36/550,229.45 = 217,429.21/x
  3. Step 3: Cross multiply
    398,707.36x = 550,229.45 × 217,429.21
  4. Step 4: Simplify right side
    398,707.36x = 119,635,954,232.88
  5. Step 5: Solve for x
    x = 119,635,954,232.88/398,707.36
  6. Step 6: Final answer
    x = 300,059.56

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1.5x scale

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.