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Finding the Fourth Proportional to 539.69, 744.57 and 340.43

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Solution

The fourth proportional to 539.69, 744.57 and 340.43 is: 469.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.69 : 744.57 = 340.43 : x
  2. Step 2: Convert to fraction form
    539.69/744.57 = 340.43/x
  3. Step 3: Cross multiply
    539.69x = 744.57 × 340.43
  4. Step 4: Simplify right side
    539.69x = 253,470.24
  5. Step 5: Solve for x
    x = 253,470.24/539.69
  6. Step 6: Final answer
    x = 469.66

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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.