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Finding the Fourth Proportional to 543.88, 815.64 and 235.43

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Solution

The fourth proportional to 543.88, 815.64 and 235.43 is: 353.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.88 : 815.64 = 235.43 : x
  2. Step 2: Convert to fraction form
    543.88/815.64 = 235.43/x
  3. Step 3: Cross multiply
    543.88x = 815.64 × 235.43
  4. Step 4: Simplify right side
    543.88x = 192,026.13
  5. Step 5: Solve for x
    x = 192,026.13/543.88
  6. Step 6: Final answer
    x = 353.07

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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.