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Finding the Fourth Proportional to 539.96, 744.72 and 343.60

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Solution

The fourth proportional to 539.96, 744.72 and 343.60 is: 473.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.96 : 744.72 = 343.60 : x
  2. Step 2: Convert to fraction form
    539.96/744.72 = 343.60/x
  3. Step 3: Cross multiply
    539.96x = 744.72 × 343.60
  4. Step 4: Simplify right side
    539.96x = 255,885.79
  5. Step 5: Solve for x
    x = 255,885.79/539.96
  6. Step 6: Final answer
    x = 473.90

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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.