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Finding the Fourth Proportional to 393,145.23, 588,853.45 and 324,903.86

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Solution

The fourth proportional to 393,145.23, 588,853.45 and 324,903.86 is: 486,641.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,145.23 : 588,853.45 = 324,903.86 : x
  2. Step 2: Convert to fraction form
    393,145.23/588,853.45 = 324,903.86/x
  3. Step 3: Cross multiply
    393,145.23x = 588,853.45 × 324,903.86
  4. Step 4: Simplify right side
    393,145.23x = 191,320,756,721.80
  5. Step 5: Solve for x
    x = 191,320,756,721.80/393,145.23
  6. Step 6: Final answer
    x = 486,641.43

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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.