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Finding the Fourth Proportional to 678,664, 936,595.20 and 376,877.44

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Solution

The fourth proportional to 678,664, 936,595.20 and 376,877.44 is: 520,112.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,664 : 936,595.20 = 376,877.44 : x
  2. Step 2: Convert to fraction form
    678,664/936,595.20 = 376,877.44/x
  3. Step 3: Cross multiply
    678,664x = 936,595.20 × 376,877.44
  4. Step 4: Simplify right side
    678,664x = 352,981,601,292.29
  5. Step 5: Solve for x
    x = 352,981,601,292.29/678,664
  6. Step 6: Final answer
    x = 520,112.46

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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.