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Finding the Fourth Proportional to 399,912.26, 551,521.24 and 331,821.32

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Solution

The fourth proportional to 399,912.26, 551,521.24 and 331,821.32 is: 457,616.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,912.26 : 551,521.24 = 331,821.32 : x
  2. Step 2: Convert to fraction form
    399,912.26/551,521.24 = 331,821.32/x
  3. Step 3: Cross multiply
    399,912.26x = 551,521.24 × 331,821.32
  4. Step 4: Simplify right side
    399,912.26x = 183,006,502,277.68
  5. Step 5: Solve for x
    x = 183,006,502,277.68/399,912.26
  6. Step 6: Final answer
    x = 457,616.64

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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.