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Finding the Fourth Proportional to 668,003.78, 921,883.29 and 396,232.58

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Solution

The fourth proportional to 668,003.78, 921,883.29 and 396,232.58 is: 546,823.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,003.78 : 921,883.29 = 396,232.58 : x
  2. Step 2: Convert to fraction form
    668,003.78/921,883.29 = 396,232.58/x
  3. Step 3: Cross multiply
    668,003.78x = 921,883.29 × 396,232.58
  4. Step 4: Simplify right side
    668,003.78x = 365,280,194,455.59
  5. Step 5: Solve for x
    x = 365,280,194,455.59/668,003.78
  6. Step 6: Final answer
    x = 546,823.54

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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.