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Finding the Fourth Proportional to 542.09, 813.54 and 434.36

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Solution

The fourth proportional to 542.09, 813.54 and 434.36 is: 651.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.09 : 813.54 = 434.36 : x
  2. Step 2: Convert to fraction form
    542.09/813.54 = 434.36/x
  3. Step 3: Cross multiply
    542.09x = 813.54 × 434.36
  4. Step 4: Simplify right side
    542.09x = 353,372.90
  5. Step 5: Solve for x
    x = 353,372.90/542.09
  6. Step 6: Final answer
    x = 651.87

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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.