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Finding the Fourth Proportional to 539.85, 744.97 and 330.38

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Solution

The fourth proportional to 539.85, 744.97 and 330.38 is: 455.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.85 : 744.97 = 330.38 : x
  2. Step 2: Convert to fraction form
    539.85/744.97 = 330.38/x
  3. Step 3: Cross multiply
    539.85x = 744.97 × 330.38
  4. Step 4: Simplify right side
    539.85x = 246,123.19
  5. Step 5: Solve for x
    x = 246,123.19/539.85
  6. Step 6: Final answer
    x = 455.91

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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.