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Finding the Fourth Proportional to 351.09, 528.57 and 243.63

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Solution

The fourth proportional to 351.09, 528.57 and 243.63 is: 366.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.09 : 528.57 = 243.63 : x
  2. Step 2: Convert to fraction form
    351.09/528.57 = 243.63/x
  3. Step 3: Cross multiply
    351.09x = 528.57 × 243.63
  4. Step 4: Simplify right side
    351.09x = 128,775.51
  5. Step 5: Solve for x
    x = 128,775.51/351.09
  6. Step 6: Final answer
    x = 366.79

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.