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Finding the Fourth Proportional to 388,115.05, 535,598.69 and 216,029.31

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Solution

The fourth proportional to 388,115.05, 535,598.69 and 216,029.31 is: 298,120.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,115.05 : 535,598.69 = 216,029.31 : x
  2. Step 2: Convert to fraction form
    388,115.05/535,598.69 = 216,029.31/x
  3. Step 3: Cross multiply
    388,115.05x = 535,598.69 × 216,029.31
  4. Step 4: Simplify right side
    388,115.05x = 115,705,015,977.68
  5. Step 5: Solve for x
    x = 115,705,015,977.68/388,115.05
  6. Step 6: Final answer
    x = 298,120.41

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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.