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Finding the Fourth Proportional to 399,789.86, 599,788.67 and 119,307.11

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Solution

The fourth proportional to 399,789.86, 599,788.67 and 119,307.11 is: 178,991.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,789.86 : 599,788.67 = 119,307.11 : x
  2. Step 2: Convert to fraction form
    399,789.86/599,788.67 = 119,307.11/x
  3. Step 3: Cross multiply
    399,789.86x = 599,788.67 × 119,307.11
  4. Step 4: Simplify right side
    399,789.86x = 71,559,049,232.96
  5. Step 5: Solve for x
    x = 71,559,049,232.96/399,789.86
  6. Step 6: Final answer
    x = 178,991.66

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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.