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Finding the Fourth Proportional to 490,165.49, 676,491.81 and 275,305.55

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Solution

The fourth proportional to 490,165.49, 676,491.81 and 275,305.55 is: 379,957.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,165.49 : 676,491.81 = 275,305.55 : x
  2. Step 2: Convert to fraction form
    490,165.49/676,491.81 = 275,305.55/x
  3. Step 3: Cross multiply
    490,165.49x = 676,491.81 × 275,305.55
  4. Step 4: Simplify right side
    490,165.49x = 186,241,948,446.02
  5. Step 5: Solve for x
    x = 186,241,948,446.02/490,165.49
  6. Step 6: Final answer
    x = 379,957.28

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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.