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Finding the Fourth Proportional to 679,591.20, 937,730.88 and 393,137.94

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Solution

The fourth proportional to 679,591.20, 937,730.88 and 393,137.94 is: 542,469.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,591.20 : 937,730.88 = 393,137.94 : x
  2. Step 2: Convert to fraction form
    679,591.20/937,730.88 = 393,137.94/x
  3. Step 3: Cross multiply
    679,591.20x = 937,730.88 × 393,137.94
  4. Step 4: Simplify right side
    679,591.20x = 368,657,586,437.59
  5. Step 5: Solve for x
    x = 368,657,586,437.59/679,591.20
  6. Step 6: Final answer
    x = 542,469.63

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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.