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Finding the Fourth Proportional to 678,216.50, 935,982.51 and 376,410.50

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Solution

The fourth proportional to 678,216.50, 935,982.51 and 376,410.50 is: 519,470.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,216.50 : 935,982.51 = 376,410.50 : x
  2. Step 2: Convert to fraction form
    678,216.50/935,982.51 = 376,410.50/x
  3. Step 3: Cross multiply
    678,216.50x = 935,982.51 × 376,410.50
  4. Step 4: Simplify right side
    678,216.50x = 352,313,644,580.36
  5. Step 5: Solve for x
    x = 352,313,644,580.36/678,216.50
  6. Step 6: Final answer
    x = 519,470.77

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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.