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Finding the Fourth Proportional to 393,399.38, 587,859.53 and 295,387.03

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Solution

The fourth proportional to 393,399.38, 587,859.53 and 295,387.03 is: 441,398.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,399.38 : 587,859.53 = 295,387.03 : x
  2. Step 2: Convert to fraction form
    393,399.38/587,859.53 = 295,387.03/x
  3. Step 3: Cross multiply
    393,399.38x = 587,859.53 × 295,387.03
  4. Step 4: Simplify right side
    393,399.38x = 173,646,078,423.07
  5. Step 5: Solve for x
    x = 173,646,078,423.07/393,399.38
  6. Step 6: Final answer
    x = 441,398.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.