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Finding the Fourth Proportional to 388,186.38, 535,696.11 and 218,420.52

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Solution

The fourth proportional to 388,186.38, 535,696.11 and 218,420.52 is: 301,419.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,186.38 : 535,696.11 = 218,420.52 : x
  2. Step 2: Convert to fraction form
    388,186.38/535,696.11 = 218,420.52/x
  3. Step 3: Cross multiply
    388,186.38x = 535,696.11 × 218,420.52
  4. Step 4: Simplify right side
    388,186.38x = 117,007,022,908.18
  5. Step 5: Solve for x
    x = 117,007,022,908.18/388,186.38
  6. Step 6: Final answer
    x = 301,419.70

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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.