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Finding the Fourth Proportional to 275,310.72, 412,878.59 and 187,130.88

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Solution

The fourth proportional to 275,310.72, 412,878.59 and 187,130.88 is: 280,636.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,310.72 : 412,878.59 = 187,130.88 : x
  2. Step 2: Convert to fraction form
    275,310.72/412,878.59 = 187,130.88/x
  3. Step 3: Cross multiply
    275,310.72x = 412,878.59 × 187,130.88
  4. Step 4: Simplify right side
    275,310.72x = 77,262,334,347.69
  5. Step 5: Solve for x
    x = 77,262,334,347.69/275,310.72
  6. Step 6: Final answer
    x = 280,636.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.