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Finding the Fourth Proportional to 645,304.20, 967,956.30 and 393,361.80

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Solution

The fourth proportional to 645,304.20, 967,956.30 and 393,361.80 is: 590,042.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,304.20 : 967,956.30 = 393,361.80 : x
  2. Step 2: Convert to fraction form
    645,304.20/967,956.30 = 393,361.80/x
  3. Step 3: Cross multiply
    645,304.20x = 967,956.30 × 393,361.80
  4. Step 4: Simplify right side
    645,304.20x = 380,757,032,489.34
  5. Step 5: Solve for x
    x = 380,757,032,489.34/645,304.20
  6. Step 6: Final answer
    x = 590,042.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.