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Finding the Fourth Proportional to 678,321.76, 936,037.20 and 376,492

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Solution

The fourth proportional to 678,321.76, 936,037.20 and 376,492 is: 519,532.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,321.76 : 936,037.20 = 376,492 : x
  2. Step 2: Convert to fraction form
    678,321.76/936,037.20 = 376,492/x
  3. Step 3: Cross multiply
    678,321.76x = 936,037.20 × 376,492
  4. Step 4: Simplify right side
    678,321.76x = 352,410,517,502.40
  5. Step 5: Solve for x
    x = 352,410,517,502.40/678,321.76
  6. Step 6: Final answer
    x = 519,532.97

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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.