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Finding the Fourth Proportional to 275,265.78, 379,909.35 and 154,455.90

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Solution

The fourth proportional to 275,265.78, 379,909.35 and 154,455.90 is: 213,173.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,265.78 : 379,909.35 = 154,455.90 : x
  2. Step 2: Convert to fraction form
    275,265.78/379,909.35 = 154,455.90/x
  3. Step 3: Cross multiply
    275,265.78x = 379,909.35 × 154,455.90
  4. Step 4: Simplify right side
    275,265.78x = 58,679,240,572.67
  5. Step 5: Solve for x
    x = 58,679,240,572.67/275,265.78
  6. Step 6: Final answer
    x = 213,173.03

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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.