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Finding the Fourth Proportional to 388,358.43, 535,930.32 and 216,272.64

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Solution

The fourth proportional to 388,358.43, 535,930.32 and 216,272.64 is: 298,453.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,358.43 : 535,930.32 = 216,272.64 : x
  2. Step 2: Convert to fraction form
    388,358.43/535,930.32 = 216,272.64/x
  3. Step 3: Cross multiply
    388,358.43x = 535,930.32 × 216,272.64
  4. Step 4: Simplify right side
    388,358.43x = 115,907,064,351.42
  5. Step 5: Solve for x
    x = 115,907,064,351.42/388,358.43
  6. Step 6: Final answer
    x = 298,453.84

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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.