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Finding the Fourth Proportional to 351.09, 528.62 and 243.59

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Solution

The fourth proportional to 351.09, 528.62 and 243.59 is: 366.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.09 : 528.62 = 243.59 : x
  2. Step 2: Convert to fraction form
    351.09/528.62 = 243.59/x
  3. Step 3: Cross multiply
    351.09x = 528.62 × 243.59
  4. Step 4: Simplify right side
    351.09x = 128,762.68
  5. Step 5: Solve for x
    x = 128,762.68/351.09
  6. Step 6: Final answer
    x = 366.75

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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.