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Finding the Fourth Proportional to 539.79, 810.09 and 401.29

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Solution

The fourth proportional to 539.79, 810.09 and 401.29 is: 602.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.79 : 810.09 = 401.29 : x
  2. Step 2: Convert to fraction form
    539.79/810.09 = 401.29/x
  3. Step 3: Cross multiply
    539.79x = 810.09 × 401.29
  4. Step 4: Simplify right side
    539.79x = 325,078.99
  5. Step 5: Solve for x
    x = 325,078.99/539.79
  6. Step 6: Final answer
    x = 602.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.