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Finding the Fourth Proportional to 514.27, 709.70 and 281.40

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Solution

The fourth proportional to 514.27, 709.70 and 281.40 is: 388.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.27 : 709.70 = 281.40 : x
  2. Step 2: Convert to fraction form
    514.27/709.70 = 281.40/x
  3. Step 3: Cross multiply
    514.27x = 709.70 × 281.40
  4. Step 4: Simplify right side
    514.27x = 199,704.62
  5. Step 5: Solve for x
    x = 199,704.62/514.27
  6. Step 6: Final answer
    x = 388.33

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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.