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Finding the Fourth Proportional to 385,419.53, 531,893.18 and 211,001.96

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Solution

The fourth proportional to 385,419.53, 531,893.18 and 211,001.96 is: 291,190.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,419.53 : 531,893.18 = 211,001.96 : x
  2. Step 2: Convert to fraction form
    385,419.53/531,893.18 = 211,001.96/x
  3. Step 3: Cross multiply
    385,419.53x = 531,893.18 × 211,001.96
  4. Step 4: Simplify right side
    385,419.53x = 112,230,505,347.87
  5. Step 5: Solve for x
    x = 112,230,505,347.87/385,419.53
  6. Step 6: Final answer
    x = 291,190.50

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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.