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Finding the Fourth Proportional to 386,542.62, 533,427.80 and 216,780.39

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Solution

The fourth proportional to 386,542.62, 533,427.80 and 216,780.39 is: 299,156.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,542.62 : 533,427.80 = 216,780.39 : x
  2. Step 2: Convert to fraction form
    386,542.62/533,427.80 = 216,780.39/x
  3. Step 3: Cross multiply
    386,542.62x = 533,427.80 × 216,780.39
  4. Step 4: Simplify right side
    386,542.62x = 115,636,685,436.94
  5. Step 5: Solve for x
    x = 115,636,685,436.94/386,542.62
  6. Step 6: Final answer
    x = 299,156.37

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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.