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Finding the Fourth Proportional to 275,915.45, 380,761.35 and 155,054.14

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Solution

The fourth proportional to 275,915.45, 380,761.35 and 155,054.14 is: 213,973.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,915.45 : 380,761.35 = 155,054.14 : x
  2. Step 2: Convert to fraction form
    275,915.45/380,761.35 = 155,054.14/x
  3. Step 3: Cross multiply
    275,915.45x = 380,761.35 × 155,054.14
  4. Step 4: Simplify right side
    275,915.45x = 59,038,623,669.49
  5. Step 5: Solve for x
    x = 59,038,623,669.49/275,915.45
  6. Step 6: Final answer
    x = 213,973.61

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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.