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Finding the Fourth Proportional to 399,333.36, 551,091.40 and 218,056.80

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Solution

The fourth proportional to 399,333.36, 551,091.40 and 218,056.80 is: 300,924.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,333.36 : 551,091.40 = 218,056.80 : x
  2. Step 2: Convert to fraction form
    399,333.36/551,091.40 = 218,056.80/x
  3. Step 3: Cross multiply
    399,333.36x = 551,091.40 × 218,056.80
  4. Step 4: Simplify right side
    399,333.36x = 120,169,227,191.52
  5. Step 5: Solve for x
    x = 120,169,227,191.52/399,333.36
  6. Step 6: Final answer
    x = 300,924.59

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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.