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Finding the Fourth Proportional to 399,993.75, 551,999.97 and 238,818.72

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Solution

The fourth proportional to 399,993.75, 551,999.97 and 238,818.72 is: 329,574.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,993.75 : 551,999.97 = 238,818.72 : x
  2. Step 2: Convert to fraction form
    399,993.75/551,999.97 = 238,818.72/x
  3. Step 3: Cross multiply
    399,993.75x = 551,999.97 × 238,818.72
  4. Step 4: Simplify right side
    399,993.75x = 131,827,926,275.44
  5. Step 5: Solve for x
    x = 131,827,926,275.44/399,993.75
  6. Step 6: Final answer
    x = 329,574.97

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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.