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Finding the Fourth Proportional to 543.45, 815.31 and 235.35

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Solution

The fourth proportional to 543.45, 815.31 and 235.35 is: 353.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.45 : 815.31 = 235.35 : x
  2. Step 2: Convert to fraction form
    543.45/815.31 = 235.35/x
  3. Step 3: Cross multiply
    543.45x = 815.31 × 235.35
  4. Step 4: Simplify right side
    543.45x = 191,883.21
  5. Step 5: Solve for x
    x = 191,883.21/543.45
  6. Step 6: Final answer
    x = 353.08

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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.