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Finding the Fourth Proportional to 528.86, 793.33 and 138.86

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Solution

The fourth proportional to 528.86, 793.33 and 138.86 is: 208.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.86 : 793.33 = 138.86 : x
  2. Step 2: Convert to fraction form
    528.86/793.33 = 138.86/x
  3. Step 3: Cross multiply
    528.86x = 793.33 × 138.86
  4. Step 4: Simplify right side
    528.86x = 110,161.25
  5. Step 5: Solve for x
    x = 110,161.25/528.86
  6. Step 6: Final answer
    x = 208.30

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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.