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Finding the Fourth Proportional to 539.80, 744.80 and 340.56

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Solution

The fourth proportional to 539.80, 744.80 and 340.56 is: 469.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.80 : 744.80 = 340.56 : x
  2. Step 2: Convert to fraction form
    539.80/744.80 = 340.56/x
  3. Step 3: Cross multiply
    539.80x = 744.80 × 340.56
  4. Step 4: Simplify right side
    539.80x = 253,649.09
  5. Step 5: Solve for x
    x = 253,649.09/539.80
  6. Step 6: Final answer
    x = 469.89

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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.