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Finding the Fourth Proportional to 399,663.34, 599,589.25 and 129,790.58

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Solution

The fourth proportional to 399,663.34, 599,589.25 and 129,790.58 is: 194,716.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,663.34 : 599,589.25 = 129,790.58 : x
  2. Step 2: Convert to fraction form
    399,663.34/599,589.25 = 129,790.58/x
  3. Step 3: Cross multiply
    399,663.34x = 599,589.25 × 129,790.58
  4. Step 4: Simplify right side
    399,663.34x = 77,821,033,196.84
  5. Step 5: Solve for x
    x = 77,821,033,196.84/399,663.34
  6. Step 6: Final answer
    x = 194,716.47

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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.