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Finding the Fourth Proportional to 678,226.50, 935,996.31 and 376,420.50

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Solution

The fourth proportional to 678,226.50, 935,996.31 and 376,420.50 is: 519,484.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,226.50 : 935,996.31 = 376,420.50 : x
  2. Step 2: Convert to fraction form
    678,226.50/935,996.31 = 376,420.50/x
  3. Step 3: Cross multiply
    678,226.50x = 935,996.31 × 376,420.50
  4. Step 4: Simplify right side
    678,226.50x = 352,328,199,008.36
  5. Step 5: Solve for x
    x = 352,328,199,008.36/678,226.50
  6. Step 6: Final answer
    x = 519,484.57

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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.