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Finding the Fourth Proportional to 399,551.84, 551,392.34 and 238,500.31

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Solution

The fourth proportional to 399,551.84, 551,392.34 and 238,500.31 is: 329,136.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,551.84 : 551,392.34 = 238,500.31 : x
  2. Step 2: Convert to fraction form
    399,551.84/551,392.34 = 238,500.31/x
  3. Step 3: Cross multiply
    399,551.84x = 551,392.34 × 238,500.31
  4. Step 4: Simplify right side
    399,551.84x = 131,507,245,996.36
  5. Step 5: Solve for x
    x = 131,507,245,996.36/399,551.84
  6. Step 6: Final answer
    x = 329,136.88

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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.