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Finding the Fourth Proportional to 678,398.94, 936,153.98 and 376,573.50

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Solution

The fourth proportional to 678,398.94, 936,153.98 and 376,573.50 is: 519,651.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,398.94 : 936,153.98 = 376,573.50 : x
  2. Step 2: Convert to fraction form
    678,398.94/936,153.98 = 376,573.50/x
  3. Step 3: Cross multiply
    678,398.94x = 936,153.98 × 376,573.50
  4. Step 4: Simplify right side
    678,398.94x = 352,530,780,787.53
  5. Step 5: Solve for x
    x = 352,530,780,787.53/678,398.94
  6. Step 6: Final answer
    x = 519,651.14

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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.