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Finding the Fourth Proportional to 399,783.26, 551,699.59 and 218,495.15

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Solution

The fourth proportional to 399,783.26, 551,699.59 and 218,495.15 is: 301,522.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,783.26 : 551,699.59 = 218,495.15 : x
  2. Step 2: Convert to fraction form
    399,783.26/551,699.59 = 218,495.15/x
  3. Step 3: Cross multiply
    399,783.26x = 551,699.59 × 218,495.15
  4. Step 4: Simplify right side
    399,783.26x = 120,543,681,833.26
  5. Step 5: Solve for x
    x = 120,543,681,833.26/399,783.26
  6. Step 6: Final answer
    x = 301,522.58

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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.