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Finding the Fourth Proportional to 678,349.76, 936,075.84 and 376,520

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Solution

The fourth proportional to 678,349.76, 936,075.84 and 376,520 is: 519,571.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,349.76 : 936,075.84 = 376,520 : x
  2. Step 2: Convert to fraction form
    678,349.76/936,075.84 = 376,520/x
  3. Step 3: Cross multiply
    678,349.76x = 936,075.84 × 376,520
  4. Step 4: Simplify right side
    678,349.76x = 352,451,275,276.80
  5. Step 5: Solve for x
    x = 352,451,275,276.80/678,349.76
  6. Step 6: Final answer
    x = 519,571.61

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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.