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Finding the Fourth Proportional to 386,744.40, 579,425.40 and 331,448.40

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Solution

The fourth proportional to 386,744.40, 579,425.40 and 331,448.40 is: 496,580.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,744.40 : 579,425.40 = 331,448.40 : x
  2. Step 2: Convert to fraction form
    386,744.40/579,425.40 = 331,448.40/x
  3. Step 3: Cross multiply
    386,744.40x = 579,425.40 × 331,448.40
  4. Step 4: Simplify right side
    386,744.40x = 192,049,621,749.36
  5. Step 5: Solve for x
    x = 192,049,621,749.36/386,744.40
  6. Step 6: Final answer
    x = 496,580.23

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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.