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Finding the Fourth Proportional to 399,939, 600,129.93 and 239,620.97

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Solution

The fourth proportional to 399,939, 600,129.93 and 239,620.97 is: 359,564.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,939 : 600,129.93 = 239,620.97 : x
  2. Step 2: Convert to fraction form
    399,939/600,129.93 = 239,620.97/x
  3. Step 3: Cross multiply
    399,939x = 600,129.93 × 239,620.97
  4. Step 4: Simplify right side
    399,939x = 143,803,712,951.98
  5. Step 5: Solve for x
    x = 143,803,712,951.98/399,939
  6. Step 6: Final answer
    x = 359,564.12

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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.