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Finding the Fourth Proportional to 353.15, 528.80 and 243.80

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Solution

The fourth proportional to 353.15, 528.80 and 243.80 is: 365.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.15 : 528.80 = 243.80 : x
  2. Step 2: Convert to fraction form
    353.15/528.80 = 243.80/x
  3. Step 3: Cross multiply
    353.15x = 528.80 × 243.80
  4. Step 4: Simplify right side
    353.15x = 128,918.80
  5. Step 5: Solve for x
    x = 128,918.80/353.15
  6. Step 6: Final answer
    x = 365.06

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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.