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Finding the Fourth Proportional to 399,940, 600,131.43 and 239,621.97

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Solution

The fourth proportional to 399,940, 600,131.43 and 239,621.97 is: 359,565.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,940 : 600,131.43 = 239,621.97 : x
  2. Step 2: Convert to fraction form
    399,940/600,131.43 = 239,621.97/x
  3. Step 3: Cross multiply
    399,940x = 600,131.43 × 239,621.97
  4. Step 4: Simplify right side
    399,940x = 143,804,675,515.52
  5. Step 5: Solve for x
    x = 143,804,675,515.52/399,940
  6. Step 6: Final answer
    x = 359,565.62

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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.