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Finding the Fourth Proportional to 388,791.80, 536,467.72 and 216,672.16

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Solution

The fourth proportional to 388,791.80, 536,467.72 and 216,672.16 is: 298,971.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,791.80 : 536,467.72 = 216,672.16 : x
  2. Step 2: Convert to fraction form
    388,791.80/536,467.72 = 216,672.16/x
  3. Step 3: Cross multiply
    388,791.80x = 536,467.72 × 216,672.16
  4. Step 4: Simplify right side
    388,791.80x = 116,237,619,662.68
  5. Step 5: Solve for x
    x = 116,237,619,662.68/388,791.80
  6. Step 6: Final answer
    x = 298,971.38

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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.