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Finding the Fourth Proportional to 449,178.26, 619,127.30 and 318,399.71

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Solution

The fourth proportional to 449,178.26, 619,127.30 and 318,399.71 is: 438,867.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,178.26 : 619,127.30 = 318,399.71 : x
  2. Step 2: Convert to fraction form
    449,178.26/619,127.30 = 318,399.71/x
  3. Step 3: Cross multiply
    449,178.26x = 619,127.30 × 318,399.71
  4. Step 4: Simplify right side
    449,178.26x = 197,129,950,473.45
  5. Step 5: Solve for x
    x = 197,129,950,473.45/449,178.26
  6. Step 6: Final answer
    x = 438,867.97

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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.