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Finding the Fourth Proportional to 388,375.63, 535,947.50 and 216,293.54

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Solution

The fourth proportional to 388,375.63, 535,947.50 and 216,293.54 is: 298,479.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,375.63 : 535,947.50 = 216,293.54 : x
  2. Step 2: Convert to fraction form
    388,375.63/535,947.50 = 216,293.54/x
  3. Step 3: Cross multiply
    388,375.63x = 535,947.50 × 216,293.54
  4. Step 4: Simplify right side
    388,375.63x = 115,921,979,890.15
  5. Step 5: Solve for x
    x = 115,921,979,890.15/388,375.63
  6. Step 6: Final answer
    x = 298,479.03

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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.