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Finding the Fourth Proportional to 539.72, 744.82 and 315.64

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Solution

The fourth proportional to 539.72, 744.82 and 315.64 is: 435.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.72 : 744.82 = 315.64 : x
  2. Step 2: Convert to fraction form
    539.72/744.82 = 315.64/x
  3. Step 3: Cross multiply
    539.72x = 744.82 × 315.64
  4. Step 4: Simplify right side
    539.72x = 235,094.98
  5. Step 5: Solve for x
    x = 235,094.98/539.72
  6. Step 6: Final answer
    x = 435.59

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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.