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Finding the Fourth Proportional to 275,483.88, 380,138.55 and 154,638.46

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Solution

The fourth proportional to 275,483.88, 380,138.55 and 154,638.46 is: 213,384.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,483.88 : 380,138.55 = 154,638.46 : x
  2. Step 2: Convert to fraction form
    275,483.88/380,138.55 = 154,638.46/x
  3. Step 3: Cross multiply
    275,483.88x = 380,138.55 × 154,638.46
  4. Step 4: Simplify right side
    275,483.88x = 58,784,039,958.63
  5. Step 5: Solve for x
    x = 58,784,039,958.63/275,483.88
  6. Step 6: Final answer
    x = 213,384.68

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1.5x scale

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.