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Finding the Fourth Proportional to 628.50, 943.16 and 243.75

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Solution

The fourth proportional to 628.50, 943.16 and 243.75 is: 365.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.50 : 943.16 = 243.75 : x
  2. Step 2: Convert to fraction form
    628.50/943.16 = 243.75/x
  3. Step 3: Cross multiply
    628.50x = 943.16 × 243.75
  4. Step 4: Simplify right side
    628.50x = 229,894.03
  5. Step 5: Solve for x
    x = 229,894.03/628.50
  6. Step 6: Final answer
    x = 365.78

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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.