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Finding the Fourth Proportional to 399,770.54, 551,630.05 and 256,724.34

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Solution

The fourth proportional to 399,770.54, 551,630.05 and 256,724.34 is: 354,245.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,770.54 : 551,630.05 = 256,724.34 : x
  2. Step 2: Convert to fraction form
    399,770.54/551,630.05 = 256,724.34/x
  3. Step 3: Cross multiply
    399,770.54x = 551,630.05 × 256,724.34
  4. Step 4: Simplify right side
    399,770.54x = 141,616,857,799.99
  5. Step 5: Solve for x
    x = 141,616,857,799.99/399,770.54
  6. Step 6: Final answer
    x = 354,245.36

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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.