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Finding the Fourth Proportional to 609,468.80, 840,787.74 and 394,678.04

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Solution

The fourth proportional to 609,468.80, 840,787.74 and 394,678.04 is: 544,474.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,468.80 : 840,787.74 = 394,678.04 : x
  2. Step 2: Convert to fraction form
    609,468.80/840,787.74 = 394,678.04/x
  3. Step 3: Cross multiply
    609,468.80x = 840,787.74 × 394,678.04
  4. Step 4: Simplify right side
    609,468.80x = 331,840,453,075.29
  5. Step 5: Solve for x
    x = 331,840,453,075.29/609,468.80
  6. Step 6: Final answer
    x = 544,474.89

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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.