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Finding the Fourth Proportional to 388,273.78, 535,729.17 and 218,445.94

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Solution

The fourth proportional to 388,273.78, 535,729.17 and 218,445.94 is: 301,405.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,273.78 : 535,729.17 = 218,445.94 : x
  2. Step 2: Convert to fraction form
    388,273.78/535,729.17 = 218,445.94/x
  3. Step 3: Cross multiply
    388,273.78x = 535,729.17 × 218,445.94
  4. Step 4: Simplify right side
    388,273.78x = 117,027,862,126.07
  5. Step 5: Solve for x
    x = 117,027,862,126.07/388,273.78
  6. Step 6: Final answer
    x = 301,405.52

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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.