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Finding the Fourth Proportional to 399,818.52, 551,611.62 and 248,905.80

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Solution

The fourth proportional to 399,818.52, 551,611.62 and 248,905.80 is: 343,404.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,818.52 : 551,611.62 = 248,905.80 : x
  2. Step 2: Convert to fraction form
    399,818.52/551,611.62 = 248,905.80/x
  3. Step 3: Cross multiply
    399,818.52x = 551,611.62 × 248,905.80
  4. Step 4: Simplify right side
    399,818.52x = 137,299,331,565.40
  5. Step 5: Solve for x
    x = 137,299,331,565.40/399,818.52
  6. Step 6: Final answer
    x = 343,404.13

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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.