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Finding the Fourth Proportional to 388,325.33, 535,887.86 and 218,559.45

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Solution

The fourth proportional to 388,325.33, 535,887.86 and 218,559.45 is: 301,611.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,325.33 : 535,887.86 = 218,559.45 : x
  2. Step 2: Convert to fraction form
    388,325.33/535,887.86 = 218,559.45/x
  3. Step 3: Cross multiply
    388,325.33x = 535,887.86 × 218,559.45
  4. Step 4: Simplify right side
    388,325.33x = 117,123,354,850.48
  5. Step 5: Solve for x
    x = 117,123,354,850.48/388,325.33
  6. Step 6: Final answer
    x = 301,611.43

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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.