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Finding the Fourth Proportional to 321,520.28, 482,388.47 and 225,557.51

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Solution

The fourth proportional to 321,520.28, 482,388.47 and 225,557.51 is: 338,412.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,520.28 : 482,388.47 = 225,557.51 : x
  2. Step 2: Convert to fraction form
    321,520.28/482,388.47 = 225,557.51/x
  3. Step 3: Cross multiply
    321,520.28x = 482,388.47 × 225,557.51
  4. Step 4: Simplify right side
    321,520.28x = 108,806,342,145.91
  5. Step 5: Solve for x
    x = 108,806,342,145.91/321,520.28
  6. Step 6: Final answer
    x = 338,412.07

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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.