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Finding the Fourth Proportional to 388,462.80, 536,076.72 and 218,698.14

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Solution

The fourth proportional to 388,462.80, 536,076.72 and 218,698.14 is: 301,802.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,462.80 : 536,076.72 = 218,698.14 : x
  2. Step 2: Convert to fraction form
    388,462.80/536,076.72 = 218,698.14/x
  3. Step 3: Cross multiply
    388,462.80x = 536,076.72 × 218,698.14
  4. Step 4: Simplify right side
    388,462.80x = 117,238,981,561.30
  5. Step 5: Solve for x
    x = 117,238,981,561.30/388,462.80
  6. Step 6: Final answer
    x = 301,802.34

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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.