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Finding the Fourth Proportional to 399,886.47, 551,485.67 and 331,795.44

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Solution

The fourth proportional to 399,886.47, 551,485.67 and 331,795.44 is: 457,580.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,886.47 : 551,485.67 = 331,795.44 : x
  2. Step 2: Convert to fraction form
    399,886.47/551,485.67 = 331,795.44/x
  3. Step 3: Cross multiply
    399,886.47x = 551,485.67 × 331,795.44
  4. Step 4: Simplify right side
    399,886.47x = 182,980,428,872.37
  5. Step 5: Solve for x
    x = 182,980,428,872.37/399,886.47
  6. Step 6: Final answer
    x = 457,580.95

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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.