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Finding the Fourth Proportional to 399,680.96, 551,580.72 and 229,940.60

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Solution

The fourth proportional to 399,680.96, 551,580.72 and 229,940.60 is: 317,330.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,680.96 : 551,580.72 = 229,940.60 : x
  2. Step 2: Convert to fraction form
    399,680.96/551,580.72 = 229,940.60/x
  3. Step 3: Cross multiply
    399,680.96x = 551,580.72 × 229,940.60
  4. Step 4: Simplify right side
    399,680.96x = 126,830,801,705.23
  5. Step 5: Solve for x
    x = 126,830,801,705.23/399,680.96
  6. Step 6: Final answer
    x = 317,330.11

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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.