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Finding the Fourth Proportional to 540.46, 743.70 and 445.06

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Solution

The fourth proportional to 540.46, 743.70 and 445.06 is: 612.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.46 : 743.70 = 445.06 : x
  2. Step 2: Convert to fraction form
    540.46/743.70 = 445.06/x
  3. Step 3: Cross multiply
    540.46x = 743.70 × 445.06
  4. Step 4: Simplify right side
    540.46x = 330,991.12
  5. Step 5: Solve for x
    x = 330,991.12/540.46
  6. Step 6: Final answer
    x = 612.42

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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.