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Finding the Fourth Proportional to 627,744.28, 866,354.84 and 355,782.98

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Solution

The fourth proportional to 627,744.28, 866,354.84 and 355,782.98 is: 491,018.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,744.28 : 866,354.84 = 355,782.98 : x
  2. Step 2: Convert to fraction form
    627,744.28/866,354.84 = 355,782.98/x
  3. Step 3: Cross multiply
    627,744.28x = 866,354.84 × 355,782.98
  4. Step 4: Simplify right side
    627,744.28x = 308,234,306,712.62
  5. Step 5: Solve for x
    x = 308,234,306,712.62/627,744.28
  6. Step 6: Final answer
    x = 491,018.90

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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.