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Finding the Fourth Proportional to 514.20, 709.59 and 281.33

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Solution

The fourth proportional to 514.20, 709.59 and 281.33 is: 388.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.20 : 709.59 = 281.33 : x
  2. Step 2: Convert to fraction form
    514.20/709.59 = 281.33/x
  3. Step 3: Cross multiply
    514.20x = 709.59 × 281.33
  4. Step 4: Simplify right side
    514.20x = 199,627.88
  5. Step 5: Solve for x
    x = 199,627.88/514.20
  6. Step 6: Final answer
    x = 388.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.