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Finding the Fourth Proportional to 542.99, 813.26 and 412.79

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Solution

The fourth proportional to 542.99, 813.26 and 412.79 is: 618.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.99 : 813.26 = 412.79 : x
  2. Step 2: Convert to fraction form
    542.99/813.26 = 412.79/x
  3. Step 3: Cross multiply
    542.99x = 813.26 × 412.79
  4. Step 4: Simplify right side
    542.99x = 335,699.47
  5. Step 5: Solve for x
    x = 335,699.47/542.99
  6. Step 6: Final answer
    x = 618.25

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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.