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Finding the Fourth Proportional to 388,276.28, 535,732.62 and 218,448.44

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Solution

The fourth proportional to 388,276.28, 535,732.62 and 218,448.44 is: 301,408.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,276.28 : 535,732.62 = 218,448.44 : x
  2. Step 2: Convert to fraction form
    388,276.28/535,732.62 = 218,448.44/x
  3. Step 3: Cross multiply
    388,276.28x = 535,732.62 × 218,448.44
  4. Step 4: Simplify right side
    388,276.28x = 117,029,955,096.11
  5. Step 5: Solve for x
    x = 117,029,955,096.11/388,276.28
  6. Step 6: Final answer
    x = 301,408.97

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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.