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Finding the Fourth Proportional to 399,984.94, 551,979.26 and 218,697

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Solution

The fourth proportional to 399,984.94, 551,979.26 and 218,697 is: 301,801.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,984.94 : 551,979.26 = 218,697 : x
  2. Step 2: Convert to fraction form
    399,984.94/551,979.26 = 218,697/x
  3. Step 3: Cross multiply
    399,984.94x = 551,979.26 × 218,697
  4. Step 4: Simplify right side
    399,984.94x = 120,716,208,224.22
  5. Step 5: Solve for x
    x = 120,716,208,224.22/399,984.94
  6. Step 6: Final answer
    x = 301,801.88

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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.