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Finding the Fourth Proportional to 539.41, 742.91 and 465.70

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Solution

The fourth proportional to 539.41, 742.91 and 465.70 is: 641.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.41 : 742.91 = 465.70 : x
  2. Step 2: Convert to fraction form
    539.41/742.91 = 465.70/x
  3. Step 3: Cross multiply
    539.41x = 742.91 × 465.70
  4. Step 4: Simplify right side
    539.41x = 345,973.19
  5. Step 5: Solve for x
    x = 345,973.19/539.41
  6. Step 6: Final answer
    x = 641.39

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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.