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Finding the Fourth Proportional to 668,021.50, 921,844.98 and 362,091.31

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Solution

The fourth proportional to 668,021.50, 921,844.98 and 362,091.31 is: 499,672.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,021.50 : 921,844.98 = 362,091.31 : x
  2. Step 2: Convert to fraction form
    668,021.50/921,844.98 = 362,091.31/x
  3. Step 3: Cross multiply
    668,021.50x = 921,844.98 × 362,091.31
  4. Step 4: Simplify right side
    668,021.50x = 333,792,056,425.12
  5. Step 5: Solve for x
    x = 333,792,056,425.12/668,021.50
  6. Step 6: Final answer
    x = 499,672.62

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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.