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Finding the Fourth Proportional to 714,374.20, 985,846.62 and 392,078.44

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Solution

The fourth proportional to 714,374.20, 985,846.62 and 392,078.44 is: 541,073.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,374.20 : 985,846.62 = 392,078.44 : x
  2. Step 2: Convert to fraction form
    714,374.20/985,846.62 = 392,078.44/x
  3. Step 3: Cross multiply
    714,374.20x = 985,846.62 × 392,078.44
  4. Step 4: Simplify right side
    714,374.20x = 386,529,204,848.87
  5. Step 5: Solve for x
    x = 386,529,204,848.87/714,374.20
  6. Step 6: Final answer
    x = 541,073.86

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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.