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Finding the Fourth Proportional to 514.36, 709.84 and 281.49

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Solution

The fourth proportional to 514.36, 709.84 and 281.49 is: 388.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.36 : 709.84 = 281.49 : x
  2. Step 2: Convert to fraction form
    514.36/709.84 = 281.49/x
  3. Step 3: Cross multiply
    514.36x = 709.84 × 281.49
  4. Step 4: Simplify right side
    514.36x = 199,812.86
  5. Step 5: Solve for x
    x = 199,812.86/514.36
  6. Step 6: Final answer
    x = 388.47

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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.