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Finding the Fourth Proportional to 399,908.88, 551,516.58 and 331,817.94

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Solution

The fourth proportional to 399,908.88, 551,516.58 and 331,817.94 is: 457,611.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,908.88 : 551,516.58 = 331,817.94 : x
  2. Step 2: Convert to fraction form
    399,908.88/551,516.58 = 331,817.94/x
  3. Step 3: Cross multiply
    399,908.88x = 551,516.58 × 331,817.94
  4. Step 4: Simplify right side
    399,908.88x = 183,003,095,451.45
  5. Step 5: Solve for x
    x = 183,003,095,451.45/399,908.88
  6. Step 6: Final answer
    x = 457,611.98

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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.