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Finding the Fourth Proportional to 615.85, 849.63 and 394.76

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Solution

The fourth proportional to 615.85, 849.63 and 394.76 is: 544.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.85 : 849.63 = 394.76 : x
  2. Step 2: Convert to fraction form
    615.85/849.63 = 394.76/x
  3. Step 3: Cross multiply
    615.85x = 849.63 × 394.76
  4. Step 4: Simplify right side
    615.85x = 335,399.94
  5. Step 5: Solve for x
    x = 335,399.94/615.85
  6. Step 6: Final answer
    x = 544.62

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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.