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Finding the Fourth Proportional to 399,330.50, 551,087.44 and 218,053.94

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Solution

The fourth proportional to 399,330.50, 551,087.44 and 218,053.94 is: 300,920.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,330.50 : 551,087.44 = 218,053.94 : x
  2. Step 2: Convert to fraction form
    399,330.50/551,087.44 = 218,053.94/x
  3. Step 3: Cross multiply
    399,330.50x = 551,087.44 × 218,053.94
  4. Step 4: Simplify right side
    399,330.50x = 120,166,784,275.94
  5. Step 5: Solve for x
    x = 120,166,784,275.94/399,330.50
  6. Step 6: Final answer
    x = 300,920.63

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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.